TJ-079-03G - TJ Trim _ Stability Booklet Rev G (4-19)_131122258_131204790.pdf

Drawing Number TJ-079-03 Revision G Date 04/19/22

Author Marine Operations Center, 2002 SE Marine Science Drive, Newport, OR 97365

TRIM AND STABILITY BOOKLET

for the

NOAA SHIP THOMAS JEFFERSON

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

NOAA Ship Thomas Jefferson Drawing Number Rev Date Page

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 2 of 53

Contents Page

REVISIONS

REFERENCES

DEFINITIONS

1. PRINCIPAL DIMENSIONS AND PARTICULARS

2. LIGHT SHIP CHARACTERISTICS AND OTHER WEIGHTS

2.1 Deadweight Survey or Inclining Test

2.2 Light Ship Characteristics

2.3 Solid Ballast

2.4 Mean Light Operating Condition

2.5 Icing

3. TABLES of HYDROSTATICS

3.1 Zero Trim

3.2 3 Feet Trim by Stern

4. VOLUMES

4.1 Plans

4.2 Capacities and Free Surfaces

5. MAXIMUM ALLOWABLE VCG

5.1 Intact

5.2 Damaged

5.3 Change in GM by Ballasting

5.4 Change in GM by Adding Weight

6. INSTRUCTIONS TO THE MASTER

6.1 General

6.2 Burn/Ballast Sequence and Tank Use

6.3 Center of Gravity

6.4 Draft and Freeboard

6.5 VCG vs. Draft Curves

6.6 Loading Conditions

6.7 Free Surface

6.8 Shifting of Cargo

6.9 Icing

6.10 Action Following Damage

6.11 Additional Information

7. STANDARD LOADING CONDITIONS

7.1 Lightship

7.2 Mean Light Operating Condition

7.3 Standard Mission — Full Load Departure from Port

7.4 Standard Mission — Mid-Voyage

7.5 Standard Mission — Arrival

7.6 Standard Mission – Extreme Full Load

7.7 Standard Mission — Mid-Voyage with Icing

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 3 of 53

Contents Page

8. INSTRUCTIONS FOR CALCULATING OTHER LOADING CONDITIONS

9. BLANK FORMS

9.1 Summary Load Worksheet

9.2 Tank Load Worksheet

9.3 Mission Load Worksheet

9.4 Icing Worksheet

REVISIONS

Revision Date Description Approved

A 06/19/2006 General revision to include revised light ship characteristics resulting from installation of tunnel bow thruster, transducer fairing, and tankage modifications completed at Detyens Shipyard Inc, No. Charleston, SC in Mar 2006.

Modified hydrostatics properties, draft diagram, trim diagram incidental to tunnel bow thruster & transducer fairing installation.

Modified tank capacity tables incidental to tankage modification.

Modified required GM curve incidental to revised intact stability analysis.

Modified GM change due to filling tanks to suit revised tankage & hydrostatics.

Revised recommended burn/ballast sequence.

Modified loading conditions to suit revised tankage & hydrostatics.

AAA/

EDS

B 03/31/2009 Updated light ship to reflect stability test completed at Detyens Shipyard Inc, No.

Charleston, SC in Feb 2009.

Revised recommended burn/ballast sequence.

Modified tank capacity tables incidental to added HPU tanks.

Modified loading conditions to suit revised tankage.

SSI/JEK

C 10/12/2009 Modified loading condition required GM to reference composite required GM.

Modified anti-roll tank FSM for salt water

SSI/JEK

D 09/15/2016 Reformatted according to ABS Guidance for Preparing Fishing Vessels’ Stability Booklet (1990); changed ownership from “Office of NOAA Corps Operations” to “Office of Marine and Aviation Operations”; subdivided ballast tanks 4-43-1/2 into potable water tanks 3- 44-1/2 and voids 4-43-1/2; modified roll stabilization tank back to fresh water; updated lightship from shipyard weight report (2.2); added icing table by ship surface affected at two latitude ranges (2.5); added hydrostatics at 3’ aft trim (3.2); ordered tank capacity and free surface table by fluid SWBS (4.2); added required GMt at 3’ aft trim (5); added intact and damage stability limits at zero and 3’ aft trim (5.1, 5.2); added trim to table of GM changes due to filling tanks (5.3); added example righting arm curves (6.11)

NOAA/

GDMW

E 07/19/2017 Updated light ship to reflect stability test completed at NOAA Marine Operation Center Atlantic, Norfolk, VA. in April 2017.

CDI/DHK

F 10/06/2017 Updated light ship to reflect corrected Stability Test Report and updated General Ar-rangements; corrected ballast tanks to fresh (municipal) water; emptied roll stabilization tank for Mid-Voyage with Icing load case; added ITC and updated national tonnages

NOAA/

GDMW

G 04/19/2022 Updated light ship to reflect stability test completed at Colonna’s Shipyard, Norfolk, VA.

in February 2022. Updated General Arrangements and ballast tanks to suit creation of fixed ballast and ballast tank 4-10-1. Updated loading conditions to suit new light ship and tank arrangement. Updated list of references. Revised tank groups F51 and added F53.

MDD

REFERENCES

1. TJ-801-6634641 Rev A, Table of Offsets

2. 085-6980295 Rev F, Tank Capacities and Soundings for the NOAA Ship Thomas Jefferson

3. TJ-079-01 Rev D, Intact Stability Analysis for the NOAA Ship Thomas Jefferson

4. TJ-079-02 Rev D, Damage Stability Analysis for the NOAA Ship Thomas Jefferson

5. Lightweight Survey and Stability Test Report, MDD Inc., 10 February 2022, ABS-stamped on 18 March 2022

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 4 of 53

DEFINITIONS

ABL Above Baseline

ABS American Bureau of Shipping

AP Aft Perpendicular

BL Molded Baseline of Vessel

BML Longitudinal Metacentric Radius

BMT Transverse Metacentric Radius

CFR Code of Federal Regulations

CL Centerline d Distance between midship and the LCF

DISPL Molded Displacement

FO Fuel Oil

FP Forward Perpendicular

Fr Frame

FSM Free Surface Moment

FSC Free Surface Correction ft foot (feet)

FW Fresh Water

GM Metacentric Height

(Transverse unless otherwise stated)

GMavail Available GM

GMreq Minimum Acceptable (Required) GM

GMt Transverse Metacentric Height

GZ Righting Arm

IMO International Maritime Organization

In, in inch(es)

KML Longitudinal Metacentric Height above the BL

KMt Transverse Metacentric Height above the BL

LBP Length between Perpendiculars

LCB Longitudinal Center of Buoyancy

“a” (aft) or “f” (fwd) of FP

LCF Longitudinal Center of Flotation

“a” (aft) or “f” (fwd) of FP

LCG Longitudinal Center of Gravity

“a” (aft) or “f” (fwd) of FP

Liq liquid

Lmom Longitudinal Moment

LO Lube Oil

LT Long Ton(s) (equal to 2240 lbs) m slope of the waterline

MH1 Moment to Alter Heel One Degree

MLOC Mean Light Operating Condition

MTI Moment to alter Trim One Inch

MTWB Main Transverse Watertight Bulkhead

NOAA National Oceanic and

Atmospheric Administration

SG Specific Gravity

SW Salt Water

T1 Average of the aft port and starboard draft mark readings

T2 Average of the forward port and starboard draft mark readings

TAM Draft at aft Mark

TAP Draft at AP

TCG Transverse Center of Gravity

TFM Draft at forward Mark

TFP Draft at FP

TL Trim Lever

TLCF Draft at LCF

Tm Mean Molded SW Draft

TMID Draft at Midships

Tmom Transverse Moment

USCG United States Coast Guard

VCB Vertical Center of Buoyancy

VCG Vertical Center of Gravity above Baseline

Vmom Vertical Moment

WPA Waterplane Area

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 5 of 53

1. PRINCIPAL DIMENSIONS AND PARTICULARS

Ship’s Name NOAA Ship Thomas Jefferson

Type of Ship Special Purpose Vessel

Builder Halter Marine

Hull Number 1169

History

Keel Laying 25 October 1989

Launch 14 February 1991

Delivery 1 December 1991

Commissioning 8 July 2003

Owner/Operator

National Oceanic and Atmospheric Administration

(NOAA)

2002 SE Marine Science Drive

Newport, Oregon 97365

Particulars of Classification

Inspected ABS Load Line, Ocean Service

Class Number 9105067

A1, Ⓔ, AMS, ACCU

Nationality United States

Port of Registry Norfolk, VA (Public Vessel)

Call Sign WTEA

Official Number IMO Number 8892033, CG 034222

Statutory Categories

SOLAS Cargo Ship

MARPOL Not an Oil Tanker

IBC_IGC Not Applicable

ISM Other Cargo Ship

Tonnage Gross Net

ITC (registered) 1466 966

National 1772 531

Steel hull

Single screw, 8’10” diameter fixed pitch;

42” dia. bow thruster

Cruise Speed 12.0 knots

Range 12,000 Nautical Miles

Principal Dimensions

Length Overall 208 feet, 2.25 inches

Length Between Perpendiculars 190 feet

Beam 45 feet

Depth 22 feet, 9 inches

Forward Perpendicular Frame 0

Frame Spacing 24 inches

Maximum Draft 14 feet Summer Load Line, SW

15.553 feet with transducer fairing

Minimum Freeboard 8 feet, 9.25 inches

Displacement at Load Line 2,116 Long tons SW

Draft Marks Frame feet aft of FP

Forward 0 10

Midship 47 94

Aft 94 188

Transom - none

Sheer None

Camber Linear ¼” per foot, Main Deck and above

Tumblehome Linear ½” per ft above 22 ft 9 in ABL

Drag to Keel None

Fuel Capacity (95%) 131,794 gallons

Potable Water Capacity 47,382 gallons

(excluding fresh water ballast and anti-roll tank)

Boats

Rescue 1 @ 22 feet, 9 person

Survey Launches 2 @ 31 feet, 8 person

Deck Equipment

Cranes

J-Frame (1) 7500 lbs stbd

Telescopic Boom (2) 6000 lbs, 50 foot boom

Winches 1 Oceanographic, 500 lbs, 1000 m port

1 Side Scan Sonar, 800 lbs, 250 m stbd

Anchors 2 stockless forward, 3500 lbs

Operation on exposed waters is permitted. The Master is cautioned that the route may be further limited by other considerations beyond stability. The ship does not operate with a Certificate of Inspection.

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 6 of 53

General Arrangements

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 7 of 53

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 8 of 53

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 9 of 53

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 10 of 53

2. LIGHT SHIP CHARACTERISTICS AND OTHER WEIGHTS

2.1 DEADWEIGHT SURVEY OR INCLINING TEST

The most recent Inclining Test was performed at Colonna’s Shipyard Inc., Norfolk, VA on 10 February 2022. This

Trim and Stability Booklet incorporates data from the Inclining Experiment Report approved by ABS on 18 March

2022. Any further changes made to the vessel after the date of this Booklet shall void this report. If the vessel undergoes any modifications where large weight changes occur, the vessel shall have a Deadweight Survey or

Inclining Experiment done under supervision of the U.S. Coast Guard or American Bureau of Shipping to verify the lightship characteristics.

2.2 LIGHT SHIP CHARACTERISTICS

Weight Center of Gravity (feet)

Long Tons

Vertical, above

Baseline

Longitudinal, aft of Forward

Perpendicular

Transverse, starboard of

Centerline

2022 Inclining Results 1318.79 19.50 91.56 0.17

2.3 SOLID BALLAST

Prior to the February 2022 inclining test, 92.7 long tons of permanent fixed ballast was installed in Fixed Ballast

Tank 4-8-1-V.

No fixed ballast or other such weight shall be added, removed, altered, and/or relocated without the authoriza-tion and supervision of the Cognizant OCMI.

2.4 MEAN LIGHT OPERATING CONDITION

A maximum of 38 persons may be carried, based on available berths as of the Revision Date of this document.

The Master is cautioned that the number of persons carried may be limited by other considerations beyond sta-bility or berthing. The ship does not operate with a Certificate of Inspection.

2.5 ICING

Any accumulation of ice topside will cause a reduction in metacentric height (GMt) available. An approximation of this loss may be obtained by estimating the average thickness of ice over the exposed areas above the water-line, including masts, crane booms, rails, rigging, etc., as well as bulkheads and decks. Based on USCG guidance, it is assumed that ice on horizontal surfaces will accumulate twice as much as on vertical surfaces. The effect of topside icing on GMt available is shown on page 33, using the example of ice accumulation for the 42 to 66° lati-tude vertical and horizontal thicknesses. Other thickness will have a proportional effect:

Ice Accumulation Displ. & VCG Before Adding

Surfaces Ice 1600 LT 1750 LT 1950 LT

Vertical Horizontal Weight 17.5 ft 16.75 ft 16.25 ft

(inches) (LT) GMt Change (feet)

0.325 0.65 17.79 -0.21 -0.19 -0.16

0.65 1.3 35.58 -0.43 -0.37 -0.32

0.975 1.95 53.36 -0.63 -0.56 -0.47

1.3 2.6 71.15 -0.83 -0.73 -0.62

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

Matthew.Jaskoski Highlight

Matthew.Jaskoski Highlight

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 11 of 53

The magnitude of loss in available GMt indicates that significant accumulation of ice can result in a deficient sta-bility condition. Conditions favorable to ice formation should be avoided when possible. When arrival in shel-tered waters is not imminent, stability improvement measures should be considered, and ice removal proce-dures should be initiated early so that substantial amounts do not accumulate.

The table below shows an example of ice accumulation calculations based on consistent thickness across all hor-izontal and all vertical surfaces. Actual accumulations are not likely to be consistent fore and aft, port to star-board, or waterline to masthead.

0.9 kg/m ice density Thickness (in) Volume (cu ft) Weight (LT) Centroid (feet)

Side Area

(Sq Ft)

42-66°

Latitude

66-90°

Latitude

42-66°

Latitude

66-90°

Latitude

42-66°

Latitude

66-90°

Latitude

VCG

abv BL

LCG

aft FP

TCG

stbd

Port Hull Aft of Frame 50 798 0.325 0.65 21.61 43.23 0.542 1.084 18.33 145.40 -22.05

Stbd Hull Aft of Frame 50 798 0.325 0.65 21.61 43.23 0.542 1.084 18.33 145.40 22.05

Port Hull Fwd of Frame 50 1791 0.325 0.65 48.51 97.01 1.217 2.433 22.93 47.13 -18.02

Stbd Hull Fwd of Frame 50 1791 0.325 0.65 48.51 97.01 1.217 2.433 22.93 47.13 18.02

Port House Main Deck House 717 0.325 0.65 19.42 38.84 0.487 0.974 27.49 139.95 -7.96

Stbd House Main Deck House 700 0.325 0.65 18.96 37.92 0.476 0.951 27.49 139.00 5.50

Port House Forecastle Deck 646 0.325 0.65 17.50 34.99 0.439 0.878 36.15 57.99 -19.23

Stbd House Forecastle Deck 646 0.325 0.65 17.50 34.99 0.439 0.878 36.15 57.99 19.23

Port House Upper Deck 453 0.325 0.65 12.27 24.54 0.308 0.615 44.52 64.02 -13.51

Stbd House Upper Deck 453 0.325 0.65 12.27 24.54 0.308 0.615 44.52 64.02 13.51

Port House Bridge Deck 305 0.325 0.65 8.26 16.52 0.207 0.414 52.52 67.00 -9.44

Stbd House Bridge Deck 305 0.325 0.65 8.26 16.52 0.207 0.414 52.52 67.00 9.44

Port Deck Main Deck 1404 0.65 1.3 76.05 152.10 1.908 3.815 23.46 144.04 -13.71

Stbd Deck Main Deck 1611 0.65 1.3 87.26 174.53 2.189 4.378 23.46 146.20 13.01

Port Deck Fwd Focsle Deck 708 0.65 1.3 38.35 76.70 0.962 1.924 32.33 18.03 -7.94

Stbd Deck Fwd Focsle Deck 708 0.65 1.3 38.35 76.70 0.962 1.924 32.33 18.03 7.94

Port Deck Aft Focsle Deck 859 0.65 1.3 46.53 93.06 1.167 2.334 32.47 138.74 -5.91

Stbd Deck Aft Focsle Deck 523 0.65 1.3 28.33 56.66 0.711 1.421 32.47 128.32 4.68

Port Deck Upper Deck 569 0.65 1.3 30.82 61.64 0.773 1.546 40.94 61.80 -15.02

Stbd Deck Upper Deck 569 0.65 1.3 30.82 61.64 0.773 1.546 40.94 61.80 15.02

Port Deck Bridge Deck 389 0.65 1.3 21.07 42.14 0.529 1.057 48.95 68.36 -11.48

Stbd Deck Bridge Deck 389 0.65 1.3 21.07 42.14 0.529 1.057 48.95 68.36 11.48

Port Deck House Top 331 0.65 1.3 17.93 35.86 0.450 0.899 57.02 71.12 -5.26

Stbd Deck House Top 331 0.65 1.3 17.93 35.86 0.450 0.899 57.02 71.12 5.26

Totals 17794 709.18 1418.35 17.79 35.58 31.09 89.50 -0.16

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 12 of 53

3. TABLES OF HYDROSTATICS

Specific Gravity = 1.025; moment to trim is based on length between perpendiculars = 190 feet and assumes

VCG = 0.

3.1 ZERO TRIM

LCF Displace- Buoyancy-Ctr. WPA Tons/ LCF BML BMT Moment/ KML KMt Required

Draft ment LCB VCB Inch In trim GMt feet LT ft aft FP ft ABL ft

LT/in ft aft FP feet feet LT-ft/in ft abv BL feet

9 1185 90.94 5.14 5966 14.20 94.52 237.10 20.23 125.90 242.3 25.37 4.19

9.25 1228 91.07 5.28 6016 14.32 94.88 234.20 19.71 128.93 239.4 24.99 3.51

9.5 1271 91.20 5.42 6068 14.44 95.26 231.70 19.24 132.14 237.1 24.66 3.29

9.75 1314 91.34 5.56 6118 14.56 95.64 229.20 18.78 135.33 234.7 24.34 3.29

10 1358 91.49 5.70 6172 14.69 96.04 227.10 18.37 138.71 232.8 24.06 3.31

10.25 1403 91.64 5.84 6222 14.81 96.40 224.90 17.95 141.94 230.7 23.79 3.31

10.5 1447 91.80 5.98 6283 14.96 96.92 224.40 17.58 146.23 230.4 23.55 3.32

10.75 1492 91.96 6.12 6337 15.09 97.33 222.90 17.21 149.86 229.0 23.32 3.31

11 1538 92.12 6.26 6394 15.22 97.76 221.70 16.87 153.72 227.9 23.12 3.31

11.25 1584 92.29 6.40 6450 15.35 98.20 220.60 16.54 157.66 227.0 22.93 3.28

11.5 1630 92.47 6.54 6509 15.49 98.67 219.90 16.23 161.87 226.4 22.77 3.27

11.75 1677 92.65 6.68 6570 15.64 99.15 219.40 15.93 166.28 226.1 22.61 3.23

12 1724 92.83 6.82 6630 15.78 99.64 219.10 15.65 170.79 225.9 22.47 3.20

12.25 1771 93.02 6.97 6693 15.93 100.15 219.00 15.38 175.53 225.9 22.35 3.18

12.5 1819 93.22 7.11 6758 16.09 100.68 219.10 15.12 180.53 226.2 22.23 3.15

12.75 1868 93.42 7.25 6827 16.25 101.27 219.90 14.88 186.07 227.1 22.13 3.12

13 1917 93.62 7.40 6890 16.40 101.77 219.80 14.65 191.01 227.2 22.05 3.10

13.25 1966 93.83 7.54 6948 16.54 102.22 219.30 14.43 195.64 226.9 21.97 3.06

13.5 2016 94.05 7.68 7004 16.67 102.63 218.60 14.22 200.07 226.3 21.90 3.01

13.75 2066 94.26 7.83 7056 16.80 103.00 217.60 14.02 204.27 225.4 21.84 2.96

14 2117 94.47 7.97 7105 16.91 103.32 216.30 13.82 208.19 224.2 21.79 2.90

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 13 of 53

3.2 3 FEET TRIM BY STERN

3 feet trim over 190 foot LBP = 1.58% trim or 0.905°; damage stability not calculated

Origin LCF Displace- Buoyancy-Ctr. WPA Tons/ LCF BML BMT Moment/ KML KMt Required

Depth Draft ment LCB VCB Inch In trim GMt feet feet LT ft aft FP ft ABL ft

LT/in ft aft FP feet feet LT-ft/in ft abv BL feet

7.487 9.023 1185 94.81 5.17 6121 14.57 97.22 255.40 20.74 135.42 260.5 25.91 4.57

7.731 9.274 1228 94.90 5.31 6176 14.70 97.62 252.80 20.21 138.97 258.1 25.52 3.62

7.975 9.524 1271 95.00 5.45 6233 14.84 98.06 250.60 19.73 142.72 256.0 25.17 3.01

8.218 9.774 1314 95.11 5.59 6291 14.98 98.50 248.70 19.26 146.57 254.2 24.85 2.89

8.461 10.03 1358 95.23 5.73 6350 15.12 98.97 247.10 18.83 150.60 252.8 24.55 2.82

8.704 10.28 1403 95.36 5.87 6410 15.26 99.46 245.80 18.42 154.83 251.7 24.28 2.84

8.947 10.53 1447 95.49 6.01 6473 15.41 99.97 244.90 18.03 159.28 250.9 24.03 2.85

9.189 10.78 1492 95.63 6.15 6536 15.56 100.50 244.20 17.67 163.87 250.3 23.81 2.88

9.432 11.03 1538 95.79 6.29 6601 15.71 101.04 243.80 17.31 168.67 250.1 23.60 2.90

9.674 11.28 1584 95.95 6.43 6670 15.88 101.65 244.10 16.99 173.99 250.5 23.41 2.91

9.915 11.53 1630 96.12 6.57 6738 16.04 102.22 244.10 16.68 179.17 250.6 23.25 2.94

10.157 11.78 1677 96.29 6.71 6798 16.18 102.71 243.30 16.38 183.83 250.0 23.09 2.95

10.398 12.03 1724 96.48 6.85 6856 16.32 103.17 242.20 16.10 188.31 249.0 22.95 2.96

10.64 12.28 1771 96.66 7.00 6912 16.45 103.58 240.90 15.84 192.58 247.9 22.83 2.96

10.882 12.53 1819 96.85 7.14 6963 16.58 103.96 239.20 15.58 196.60 246.3 22.72 2.96

11.125 12.77 1868 97.04 7.28 7011 16.69 104.28 237.20 15.33 200.33 244.5 22.61 3.01

11.369 13.02 1917 97.22 7.42 7054 16.79 104.55 234.90 15.09 203.76 242.3 22.51 3.17

11.614 13.27 1966 97.41 7.57 7093 16.88 104.77 232.30 14.85 206.85 239.8 22.41 3.24

11.859 13.52 2016 97.59 7.71 7125 16.96 104.91 229.20 14.60 209.47 236.9 22.31 3.30

12.105 13.77 2066 97.77 7.86 7152 17.03 105.00 225.70 14.35 211.64 233.5 22.21 3.39

12.352 14.01 2117 97.95 8.00 7175 17.08 105.02 221.80 14.10 213.40 229.8 22.09 3.39

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 14 of 53

4. VOLUMES

4.1 PLANS

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 15 of 53

4.2 CAPACITIES AND FREE SURFACES

Volume Volume Weight VCG LCG TCG FSM

100% At Usable Fraction Max

Full ft abv ft aft ft stbd gallons BL of FP of CL

F41 Fuel 138,730 95% 0.840 131,794 412.45 7.40 93.85 -0.02 875.45 885.40

Storage 4-16-1 16,436 95% 0.840 15,614 48.87 7.87 38.35 7.39 116.84 118.60

Storage 4-16-2 16,436 95% 0.840 15,614 48.87 7.87 38.35 -7.39 116.84 118.60

Storage 4-34-1 24,304 95% 0.840 23,089 72.26 7.23 77.02 14.94 104.38 104.90

Storage 4-34-2 24,304 95% 0.840 23,089 72.26 7.23 77.02 -14.94 104.38 104.90

Storage 4-55-1 15,394 95% 0.840 14,624 45.77 4.23 124.29 15.06 134.91 135.20

Storage 4-55-2 15,394 95% 0.840 14,624 45.77 4.23 124.29 -15.06 134.91 135.20

Service 4-75-1 3,536 95% 0.840 3,359 10.51 9.29 156.19 5.90 3.32 5.00

Service 4-75-2 3,536 95% 0.840 3,359 10.51 9.29 156.19 -5.90 3.32 5.00

Storage 4-75-3 9,566 95% 0.840 9,088 28.44 11.15 158.82 14.40 78.26 79.00

Storage 4-75-4 9,566 95% 0.840 9,088 28.44 11.15 158.82 -14.40 78.26 79.00

Emerg. Gen. 1-87-2 258 95% 0.840 245 0.77 27.17 175.00 -10.00 0.03 0.00

F46 Lube Oil 2,426 98% 0.920 2,377 8.15 7.83 137.00 -3.57 8.42 8.42

Gear 3-75-1 354 98% 0.920 347 1.19 11.96 152.00 1.50 0.23 0.23

Aux Eng 3-75-2 354 98% 0.920 347 1.19 11.96 152.00 -1.50 0.23 0.23

Main Eng 3-75-4 707 98% 0.920 693 2.37 11.96 152.00 -6.00 1.82 1.82

Dirty Oil 4-57-2 1,011 98% 0.920 991 3.40 2.05 116.00 -4.38 6.14 6.14

F51 Ballast Water 89,145 85% 0.999 75,966 282.74 8.60 72.80 -0.33 1601.31 2519.90

Forepeak 4-0-0 17,555 100% 0.999 17,555 65.34 16.08 9.35 0.00 0.00 202.30

Wing 4-10-1 5,241 100% 0.999 5,241 19.51 8.23 28.34 4.92 0.00 36.60

Wing 4-08-2 10,488 100% 0.999 10,488 39.04 8.90 24.88 -5.23 0.00 59.70

Double Btm 4-22-0 6,408 100% 0.999 6,408 23.85 2.72 50.08 0.00 0.00 115.30

Double Btm 4-22-1 4,081 100% 0.999 4,081 15.19 3.37 53.01 13.13 0.00 55.50

Double Btm 4-22-2 4,081 100% 0.999 4,081 15.19 3.37 53.01 -13.13 0.00 55.50

Double Btm 4-59-0 5,923 100% 0.999 5,923 22.04 2.13 123.95 0.00 0.00 164.10

Centerline 4-75-0 11,784 100% 0.999 11,784 43.86 10.66 163.64 0.00 0.00 168.10

Roll Stability 3-51-0 23,584 44% 0.999 10,405 38.73 7.00 106.00 0.00 1601.3 1662.8

F52 Fresh Water 47,382 100% 0.999 47,382 176.35 12.60 123.35 0.05 0.0 204.8

Potable 3-30-1 2,829 100% 0.999 2,829 10.53 10.00 63.00 4.00 0.00 7.00

Potable 3-30-2 2,829 100% 0.999 2,829 10.53 10.00 63.00 -4.00 0.00 7.00

Potable 3-44-1 12,211 100% 0.999 12,211 45.45 8.23 95.68 14.94 0.00 42.10

Potable 3-44-2 12,211 100% 0.999 12,211 45.45 8.23 95.68 -14.94 0.00 42.10

Potable 2-87-1 8,768 100% 0.999 8,768 32.63 19.64 182.05 14.18 0.00 56.70

Potable 2-87-2 8,534 100% 0.999 8,534 31.76 19.57 182.22 -14.27 0.00 49.90

F53 Sea Water 1,011 100% 1.025 1,011 3.86 2.09 116.00 4.39 0.00 6.80

Oily Bilge 4-57-1 1,011 100% 1.025 1,011 3.86 2.09 116.00 4.39 0.00 6.80 foot-Long Tons

Tank Capacities

U sa b le

Fr a ct io n

Sp e ci fi c

G ra vi ty

Zero Trim & Heel gallons LT

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 16 of 53

Table of Cargo & Storage Spaces Capacity calculated assuming 0.85 Utilization Factor

Volume Volume Weight VCG LCG TCG FSM

100% At Usable Fraction Max

Full ft abv ft aft ft stbd gallons BL of FP of CL

F54 Hydraulic Oil 1,425 98% 0.920 1,397 4.79 15.26 127.05 1.10 2.97 3.02

Reservoir 3-75-3 707 98% 0.920 693 2.37 11.96 152.00 6.00 1.82 1.82

Windlass HPU 149 98% 0.920 146 0.50 24.57 13.00 -4.67 0.12 0.12

HSL Davit HPU 143 98% 0.920 140 0.48 16.98 137.50 -20.75 0.04 0.04

Fwd Crane HPU 136 98% 0.920 133 0.46 17.73 17.92 4.46 0.63 0.63

Aft Crane HPU 136 98% 0.920 133 0.46 17.74 171.00 1.67 0.16 0.20

FRB Davit HPU 91 98% 0.920 89 0.31 15.57 165.00 1.67 0.09 0.10

Steering Gr HPU 63 98% 0.920 62 0.21 15.32 179.00 0.00 0.11 0.11

F55 Sanitary Fluids 64,505 100% 1.012 64,505 243.27 6.44 86.49 0.00 0.00 506.70

Grey Water 4-28-0 2,225 100% 0.999 2,225 8.28 2.63 58.00 0.00 0.00 37.40

Grey Water 4-34-0 29,342 100% 0.999 29,342 109.21 7.09 77.00 0.00 0.00 168.50

Sewage 4-43-0 30,913 100% 1.025 30,913 118.05 6.38 95.88 0.00 0.00 246.10

Sewage 4-55-0 2,025 100% 1.025 2,025 7.73 2.09 112.00 0.00 0.00 54.70 foot-Long Tons

Tank Capacities

U sa b le

F ra ct io n

S p e ci fi c

G ra v it y

Zero Trim & Heel gallons LT

SPACE DECK Compartment Location Capacity VCG LCG TCG

No. Frames LT ft ABL ft aft FP ft stbd

Stewards Stores Total 1.57 23.53 37.45 -5.2

Galley Main 1-16-2 16-25 0.8 28.22 43.54 -14.2

GSM Store Main 1- 8-1 8-16 0.77 18.66 31.12 4.16

Bosun Stores Total 1.62 31.32 51.53 9.01

Bosun Stores Main 1-0C-0 C-8 0.7 27 0.97 1.11

Deck Locker Fcsle 01-43-1 43-47 0.48 35.07 90 8.93

Deck Locker Fcsle 01-43-5 43-47 0.44 34.09 90 21.67

Scientific Stores Total 4.32 18.35 73.83 -4.33

Survey Cntrl Center Main 1-32-4 32-50 1.42 20.65 78.81 -10.32

Survey Stores Main 2-22-0 22-34 1.98 17.18 50.92 -2.14

Lower Survey Stores Hold 30-34 0.42 9 63.18 -4.49

Dive Locker Main 1-77-0 77-83 0.5 24.34 159.37 4.14

Engineer Stores Total 6.2 15.66 158.5 4.77

Engr Stores Lower 2-75-1 75-87 2.93 16.54 164.3 11.1

Steering Gear Flat Hold 4-87-0 87-95 0.73 17.21 184.1 0.6

Workshop Lower 2-75-0 75-87 0.76 16.57 165.49 -15.12

Engine Rm Hold 4-55-0 55-75 1.51 12.75 135.22 3.02

MCS Lower 2-63-1 63-75 0.28 15.68 136.82 12.31

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 17 of 53

5. MAXIMUM ALLOWABLE VCG

The VCG calculated in each condition must be less than the maximum allowable (“Governing”) VCG values listed and plotted below, for the particular LCF draft in sea water. These allowable VCG values have not been correct-ed for a free surface moment. Therefore, the free surface moment for all tanks must be calculated. See the Op-erating Instruction for restrictions on tank loading.

Zero Trim 3 feet Trim by Stern over LBP

Damage Intact Governing Required Damage Intact Governing Required

Draft at LCF Maximum VCG

GMt

(uncorr.)

Displace-ment Maximum VCG

GMt

(uncorr.)

feet feet above Baseline feet LT feet above Baseline feet

9 22.12 21.18 21.18 25.37 4.19 1185 22.61 21.34 21.34 25.91 4.57

9.25 21.72 21.48 21.48 24.99 3.51 1228 22.37 21.90 21.90 25.52 3.62

9.5 21.37 21.74 21.37 24.66 3.29 1271 22.16 22.17 22.16 25.17 3.01

9.75 21.05 21.69 21.05 24.34 3.29 1314 21.96 22.20 21.96 24.85 2.89

10 20.75 21.51 20.75 24.06 3.31 1358 21.73 22.01 21.73 24.55 2.82

10.25 20.48 21.33 20.48 23.79 3.31 1403 21.44 21.83 21.44 24.28 2.84

10.5 20.23 21.19 20.23 23.55 3.32 1447 21.18 21.68 21.18 24.03 2.85

10.75 20.01 21.05 20.01 23.32 3.31 1492 20.93 21.54 20.93 23.81 2.88

11 19.81 20.93 19.81 23.12 3.31 1538 20.70 21.41 20.70 23.60 2.90

11.25 19.65 20.82 19.65 22.93 3.28 1584 20.50 21.30 20.50 23.41 2.91

11.5 19.50 20.70 19.50 22.77 3.27 1630 20.31 21.21 20.31 23.25 2.94

11.75 19.38 20.57 19.38 22.61 3.23 1677 20.14 21.12 20.14 23.09 2.95

12 19.27 20.46 19.27 22.47 3.20 1724 19.99 21.02 19.99 22.95 2.96

12.25 19.17 20.36 19.17 22.35 3.18 1771 19.87 20.91 19.87 22.83 2.96

12.5 19.08 20.26 19.08 22.23 3.15 1819 19.76 20.81 19.76 22.72 2.96

12.75 19.01 20.18 19.01 22.13 3.12 1868 19.60 20.71 19.60 22.61 3.01

13 18.95 20.11 18.95 22.05 3.10 1917 19.34 20.61 19.34 22.51 3.17

13.25 18.91 20.05 18.91 21.97 3.06 1966 19.17 20.52 19.17 22.41 3.24

13.5 18.89 20.00 18.89 21.90 3.01 2016 19.01 20.42 19.01 22.31 3.30

13.75 18.88 19.95 18.88 21.84 2.96 2066 18.82 20.31 18.82 22.21 3.39

14 18.89 19.91 18.89 21.79 2.90 2117 18.70 20.19 18.70 22.09 3.39

KMt KMt

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 18 of 53

5.1 INTACT

The maximum VCGs resulting from the intact stability analysis are presented in the following table and chart.

The intact stability is governed by the Weather Criterion at all drafts.

Zero Trim 3 feet Trim by Stern over LBP

Weather Energy Lifting Towing Governing Weather Energy Lifting Towing Governing

Draft at LCF

46 CFR

170.170

46 CFR

170.3 b

46 CFR

173.020

46 CFR

173.095

Allowable

Intact VCG

46 CFR

170.170

46 CFR

170.3 b

46 CFR

173.020

46 CFR

173.095

Allowable

Intact VCG feet feet above Baseline LT SW feet above Baseline

9 22.37 21.18 24.88 22.91 21.18 1185 22.93 21.34 25.43 23.28 21.34

9.25 22.11 21.48 24.51 22.79 21.48 1228 22.65 21.90 25.05 23.14 21.90

9.5 21.90 21.74 24.19 22.68 21.74 1271 22.42 22.17 24.71 23.01 22.17

9.75 21.69 22.14 23.88 22.57 21.69 1314 22.20 22.34 24.39 22.89 22.20

10 21.51 22.47 23.61 22.46 21.51 1358 22.01 22.75 24.10 22.76 22.01

10.25 21.33 22.42 23.34 22.36 21.33 1403 21.83 22.68 23.84 22.65 21.83

10.5 21.19 22.37 23.11 22.26 21.19 1447 21.68 22.62 23.60 22.53 21.68

10.75 21.05 22.31 22.89 22.16 21.05 1492 21.54 22.55 23.38 22.42 21.54

11 20.93 22.22 22.70 22.07 20.93 1538 21.41 22.48 23.17 22.31 21.41

11.25 20.82 22.10 22.51 21.98 20.82 1584 21.30 22.40 22.99 22.20 21.30

11.5 20.70 21.98 22.25 21.89 20.70 1630 21.21 22.30 22.83 22.09 21.21

11.75 20.57 21.85 22.20 21.80 20.57 1677 21.12 22.18 22.67 21.99 21.12

12 20.46 21.71 22.06 21.71 20.46 1724 21.02 22.04 22.54 21.88 21.02

12.25 20.36 21.57 21.94 21.63 20.36 1771 20.91 21.92 22.42 21.78 20.91

12.5 20.26 21.44 21.82 21.54 20.26 1819 20.81 21.79 22.31 21.68 20.81

12.75 20.18 21.32 21.73 21.45 20.18 1868 20.71 21.66 22.21 21.58 20.71

13 20.11 21.21 21.64 21.37 20.11 1917 20.61 21.53 22.11 21.48 20.61

13.25 20.05 21.10 21.56 21.29 20.05 1966 20.52 21.40 22.01 21.38 20.52

13.5 20.00 21.00 21.50 21.21 20.00 2016 20.42 21.27 21.91 21.28 20.42

13.75 19.95 20.90 21.44 21.13 19.95 2066 20.31 21.15 21.81 21.19 20.31

14 19.91 20.80 21.39 21.05 19.91 2117 20.19 21.02 21.69 21.09 20.19

D is p la ce m e n t

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 19 of 53

5.2 DAMAGED

For the calculation of extent and character of damage, 46 CFR 173.080 categorizes oceanographic research ves-sels as type Z. The extents of damage for this ship, based on Table 171.080(a) are 15.70 feet longitudinally, 9.00 feet inboard, and upward from the baseline without limit. The standard for passenger vessels carrying 400 or fewer passengers is in 46 CFR 173.075. A one-compartment standard of flooding per 46 CFR 171.070(a) assumes no damage to any main transverse watertight bulkhead. No watertight bulkheads or doors shall be removed, added, or altered without the authorization and supervision of the Cognizant Officer in Charge of Marine Inspec-tion.

Any openings that could allow water to enter the hull or deckhouse shall be kept closed at all times except when actually in use under safe conditions. These include the Main Deck or 01 Level hatches and weather doors to the forecastle and machinery spaces. No downflooding points have been found within 40 degrees of heel.

The vessel is divided into zones by seven main watertight transverse bulkheads at Frames 8, 22, 34, 43, 55, 75, and 87. The damage cases reflect damage to the compartments in each zone according to the following table.

The absence of a mark on port compartments just means that the assumed damage to the starboard side does not extend across the ship. Damage to the port side yields an equal or possibly greater margin of safety versus the described cases of the same longitudinal extent.

Damage Case 1 2 3 4 5 6 7 8

Compartment S te m t o F ra m e

F ra m es to

F ra m es to

F ra m es to

F ra m es to

F ra m es to

F ra m es to

F ra m e to T ra ns om

Chain Locker (S) X

Chain Locker (P) X

SWB FP (CL) X

Main Deck Fwd of Fr 7 X

FO 1F (S) X

FO 1F (P)

FO 1A (S) X

FO 1A (P)

Bow Thruster Room X

BLST-4-0-0 X

Main Deck Fr 8 - 50 X X X X X X

BLST 4-10-1 (S) X

BLST 4-8-2 (P)

FO 4-16-1 (S) X

FO 4-16-2 (P)

Bow Thruster Trunk X

GSM Stores X

Ships Stores X

Chilled Stores X

Freezer Stores X

BLST-4-22-0 (CL) X

Damage Case 1 2 3 4 5 6 7 8

Sonar Void X

Laundry/Exercise X

Science Stores X

FO 4-34-1 (S) X

FO 4-34-2 (P) C

Lower Dk Fr 34–43 X

Cofferdam 4-43-1 X

Cofferdam 4-43-2 C

FW 3-44-1 (S) X

FW 3-44-2 (P) C

Antiroll (C) X

FO 4-55-3 (S) X

FO 4-55-4 (P)

Engine Room X

FO 4-75-3 (S) X

FO 4-75-4 (P)

Engineer Stores X

Engineer Workshop X

FW 2-87-1 (S) X

FW 2-87-2 (P)

Aft Void (S) X

Aft Void (P)

Calculations indicate this vessel will have no more than 15 degrees of list under ideal conditions after damage.

Damage Case 2 is the limiting damage case at all drafts at zero trim and most drafts at 3’ trim by stern. The fol-lowing table and figure present the results of the damage stability calculations.

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

Matthew.Jaskoski Highlight

Matthew.Jaskoski Highlight

Matthew.Jaskoski Highlight

Matthew.Jaskoski Highlight

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 20 of 53

Maximum Allowed KG (feet, virtual)

Damage Pattern

LT SW 1 2 3 4 4t 4a 5 5t 5a 6 6t 6a 7 8 Overall

1185 25.16 22.12 22.20 18.35 23.01 23.05 17.04 22.68 22.79 17.36 23.19 24.04 24.24 25.21 22.12

1228 24.79 21.72 21.95 18.13 22.82 22.79 16.82 22.53 22.56 17.36 23.01 23.78 23.78 24.83 21.72

1271 24.45 21.37 21.75 17.86 22.65 22.53 16.63 22.39 22.33 17.38 22.86 23.51 23.33 24.50 21.37

1314 24.14 21.05 21.56 17.62 22.50 22.32 16.46 22.25 22.15 17.40 22.69 23.25 22.92 24.17 21.05

1358 23.85 20.75 21.41 17.39 22.36 22.11 16.30 22.12 21.96 17.41 22.53 23.02 22.52 23.90 20.75

1403 23.59 20.48 21.26 17.19 22.23 21.93 16.17 21.99 21.81 17.42 22.37 22.81 22.15 23.62 20.48

1447 23.35 20.23 21.12 17.01 22.10 21.76 16.05 21.86 21.66 17.43 22.20 22.62 21.81 23.39 20.23

1492 23.13 20.01 21.02 16.84 21.96 21.62 15.95 21.72 21.54 17.37 22.03 22.45 21.49 23.16 20.01

1538 22.92 19.81 20.94 16.70 21.83 21.47 15.86 21.59 21.43 17.37 21.80 22.28 21.20 22.96 19.81

1584 22.74 19.65 20.85 16.57 21.70 21.36 15.78 21.45 21.33 17.37 21.63 22.12 20.89 22.77 19.65

1630 22.57 19.50 20.79 16.45 21.57 21.25 15.72 21.30 21.25 17.37 21.46 21.95 20.69 22.60 19.50

1677 22.41 19.38 20.72 16.35 21.43 21.16 15.66 21.16 21.18 17.38 21.26 21.79 20.44 22.44 19.38

1724 22.27 19.27 20.68 16.25 21.30 21.07 15.62 21.00 21.12 17.38 21.10 21.64 20.27 22.30 19.27

1771 22.14 19.17 20.62 16.17 21.16 21.00 15.59 20.85 21.07 17.33 20.94 21.51 20.06 22.17 19.17

1819 22.04 19.08 20.60 16.10 21.01 20.95 15.55 20.69 21.04 17.35 20.81 21.39 19.92 22.03 19.08

1868 21.93 19.01 20.56 16.04 20.87 21.01 15.51 20.52 20.93 17.36 20.66 21.28 19.73 21.92 19.01

1917 21.84 18.95 20.55 15.97 20.72 20.77 15.48 20.36 20.89 17.38 20.47 21.19 19.58 21.81 18.95

1966 21.77 18.91 20.54 15.91 20.57 20.74 15.44 20.19 20.85 17.41 20.34 21.10 19.39 21.70 18.91

2016 21.70 18.89 20.52 15.86 20.41 20.70 15.41 20.02 20.81 17.43 20.04 21.03 19.24 21.60 18.89

2066 21.64 18.88 20.51 15.81 20.25 20.67 15.38 19.85 20.76 17.46 19.74 20.96 19.05 21.50 18.88

2117 21.59 18.89 20.51 15.76 20.09 20.65 15.36 19.69 20.71 17.44 19.45 20.90 18.92 21.40 18.89

1185 25.71 23.17 22.61 19.14 23.50 23.53 17.67 23.10 23.31 17.99 23.44 24.48 24.14 25.75 22.61

1228 25.33 22.77 22.37 18.83 23.30 23.25 17.44 22.93 23.07 17.96 23.24 24.15 23.65 25.36 22.37

1271 24.98 22.39 22.16 18.55 23.11 22.99 17.24 22.78 22.84 17.92 23.03 23.86 23.19 25.01 22.16

1314 24.65 22.05 21.96 18.29 22.95 22.77 17.06 22.64 22.64 17.88 22.83 23.60 22.78 24.68 21.96

1358 24.36 21.73 21.79 18.06 22.80 22.55 16.91 22.49 22.45 17.84 22.62 23.37 22.35 24.39 21.73

1403 24.08 21.44 21.61 17.85 22.66 22.36 16.77 22.35 22.29 17.80 22.42 23.14 22.04 24.12 21.44

1447 23.84 21.18 21.48 17.66 22.52 22.18 16.64 22.21 22.15 17.77 22.21 22.89 21.69 23.87 21.18

1492 23.61 20.93 21.35 17.49 22.37 22.03 16.54 22.06 22.02 17.67 22.00 22.67 21.44 23.64 20.93

1538 23.40 20.70 21.26 17.33 22.23 21.89 16.45 21.91 21.90 17.64 21.79 22.46 21.15 23.42 20.70

1584 23.22 20.50 21.18 17.20 22.09 21.77 16.37 21.76 21.80 17.62 21.58 22.27 20.94 23.22 20.50

1630 23.04 20.31 21.08 17.08 21.95 21.66 16.29 21.60 21.72 17.60 21.31 22.09 20.69 23.03 20.31

1677 22.89 20.14 21.03 16.98 21.80 21.57 16.22 21.44 21.64 17.59 21.09 21.94 20.49 22.84 20.14

1724 22.75 19.99 20.97 16.88 21.65 21.48 16.16 21.28 21.57 17.59 20.86 21.80 20.24 22.67 19.99

1771 22.62 19.87 20.93 16.79 21.50 21.42 16.10 21.11 21.50 17.53 20.69 21.67 20.04 22.51 19.87

1819 22.51 19.76 20.90 16.71 21.35 21.36 16.03 20.93 21.42 17.53 20.51 21.55 19.79 22.37 19.76

1868 22.41 19.67 20.86 16.63 21.19 21.30 15.97 20.75 21.30 17.53 20.32 21.45 19.60 22.20 19.60

1917 22.31 19.59 20.84 16.55 21.03 21.25 15.90 20.57 21.16 17.55 20.01 21.35 19.34 22.02 19.34

1966 22.22 19.52 20.80 16.47 20.86 21.14 15.83 20.39 21.07 17.57 19.71 21.27 19.17 21.87 19.17

2016 22.13 19.45 20.80 16.39 20.69 21.06 15.76 20.19 20.99 17.17 19.41 21.20 19.01 21.72 19.01

2066 22.04 19.38 20.77 16.30 20.51 20.99 15.70 20.00 20.90 16.47 19.16 21.14 18.82 21.55 18.82

2117 21.94 19.31 20.75 16.22 20.33 20.91 15.64 19.82 20.82 15.23 18.92 21.09 18.70 21.39 18.70

Z e ro

T ri m

T ri m b y S te rn o v e r

LB

P Intact

Displacement

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 21 of 53

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 22 of 53

5.3 CHANGE IN GM BY BALLASTING

This table shows changes in trim and GMt for a range of displacements when ballast (or other fluids) is added.

Values are in feet. A positive value means the GMt increases, increasing stability. A negative value means the

GMt decreases, reducing stability. VCG, trim and free surface effects are all included in the GMt change.

Added Displacement & VCG Before Filling Tank

Weight VCG 1600 LT 1750 LT 1950 LT 1600 LT 1750 LT 1950 LT ft abv 17.5 ft 16.75 ft 16.25 ft 17.5 ft 16.75 ft 16.25 ft

BL Trim Change (feet/LBP) GMt Change (feet)

F41 Fuel

Storage 4-16-1 48.87 7.87 -1.70 -1.59 -1.47 -0.13 -0.11 -0.09

Storage 4-16-2 48.87 7.87 -1.70 -1.59 -1.47 -0.13 -0.11 -0.09

Storage 4-34-1 72.26 7.23 -1.02 -0.97 -0.93 0.35 0.26 0.19

Storage 4-34-2 72.26 7.23 -1.02 -0.97 -0.93 0.35 0.26 0.19

Storage 4-55-1 45.77 4.23 0.58 0.50 0.42 0.40 0.35 0.30

Storage 4-55-2 45.77 4.23 0.58 0.50 0.42 0.40 0.35 0.30

Service 4-75-1 10.51 9.29 0.34 0.31 0.26 0.06 0.06 0.06

Service 4-75-2 10.51 9.29 0.34 0.31 0.26 0.06 0.06 0.06

Storage 4-75-3 28.44 11.15 0.93 0.83 0.72 0.16 0.14 0.13

Storage 4-75-4 28.44 11.15 0.93 0.83 0.72 0.16 0.14 0.13

Emerg. Gen. 1-87-2 0.77 27.17 0.03 0.03 0.03 0.00 0.00 0.00

F46 Lube Oil

Gear 3-75-1 1.19 11.96 0.04 0.03 0.03 0.01 0.00 0.01

Aux Eng 3-75-2 1.19 11.96 0.04 0.03 0.03 0.01 0.00 0.01

Main Eng 3-75-4 2.37 11.96 0.07 0.06 0.06 0.01 0.01 0.01

Dirty Oil 4-57-2 3.40 2.05 0.03 0.03 0.02 0.02 0.02 0.02

F51 Ballast Water

Forepeak 4-0-0 65.34 16.08 -3.34 -3.12 -2.84 -0.55 -0.48 -0.42

Wing 4-10-1 19.51 8.23 -0.72 -0.67 -0.62 0.05 0.04 0.04

Wing 4-08-2 39.04 8.90 -1.64 -1.53 -1.40 -0.12 -0.10 -0.08

Double Btm 4-22-0 23.85 2.72 -0.65 -0.62 -0.57 0.04 0.05 0.06

Double Btm 4-22-1 15.19 3.37 -0.40 -0.37 -0.35 0.04 0.04 0.04

Double Btm 4-22-2 15.19 3.37 -0.40 -0.37 -0.35 0.04 0.03 0.04

Double Btm 4-59-0 22.04 2.13 0.31 0.27 0.22 0.17 0.16 0.16

Centerline 4-75-0 43.86 10.66 1.54 1.37 1.20 0.25 0.24 0.23

Roll Stability 3-51-0 38.73 7.00 0.34 0.24 0.14 0.16 0.17 0.19

F52 Fresh Water

Potable 3-30-1 10.53 10.00 -0.21 -0.20 -0.19 -0.02 -0.01 -0.01

Potable 3-30-2 10.53 10.00 -0.21 -0.20 -0.19 -0.02 -0.01 -0.01

Potable 3-44-1 45.45 8.23 -0.14 -0.15 -0.18 0.22 0.19 0.16

Potable 3-44-2 45.45 8.23 -0.14 -0.15 -0.18 0.22 0.19 0.16

Potable 2-87-1 32.63 19.64 1.45 1.30 1.15 0.13 0.11 0.10

Potable 2-87-2 31.76 19.57 1.42 1.27 1.12 0.12 0.11 0.10

F53 Sea Water

Oily Bilge 4-57-1 3.86 2.09 0.04 0.03 0.03 0.03 0.03 0.03

Long

Tons

Tank Capacities

Zero Trim & Heel

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 23 of 53

5.4 CHANGE IN GM BY ADDING WEIGHT

The following table shows the change in GMt resulting from an addition of 10 long tons at or near the LCF and on centerline, so as not to induce trim or heel. This facilitates estimating the effect on stability of weight chang-es at various levels, as from additional stores, deck cargo, etc. The change in GMt is proportional for weights other than 10 long tons. When weights are removed, the change is the same as for weights added, but with the sign reversed. Added weight is assumed to have a VCG of 3 feet above the deck at each location cited. Decks noted (CL) have ¼” linear camber (decreased height above baseline) per foot of distance from centerline.

Added Displacement & VCG Before Filling Tank

Weight VCG 1600 LT 1750 LT 1950 LT 1600 LT 1750 LT 1950 LT ft abv 17.5 ft 16.75 ft 16.25 ft 17.5 ft 16.75 ft 16.25 ft

BL Trim Change (feet/LBP) GMt Change (feet)

F54 Hydraulic Oil

Reservoir 3-75-3 2.37 11.96 0.07 0.06 0.06 0.01 0.01 0.01

Windlass HPU 0.50 24.57 -0.03 -0.02 -0.02 -0.01 -0.01 -0.01

HSL Davit HPU 0.48 16.98 0.01 0.01 0.01 0.00 0.00 0.00

Fwd Crane HPU 0.46 17.73 -0.02 -0.02 -0.02 -0.01 -0.01 0.00

Aft Crane HPU 0.46 17.74 0.02 0.02 0.01 0.00 0.00 0.00

FRB Davit HPU 0.31 15.57 0.01 0.01 0.01 0.00 0.00 0.00

Steering Gr HPU 0.21 15.32 0.01 0.01 0.01 0.00 0.00 0.00

F55 Sanitary Fluids

Grey Water 4-28-0 8.28 2.63 -0.19 -0.18 -0.17 0.02 0.02 0.02

Grey Water 4-34-0 109.21 7.09 -1.30 -1.28 -1.24 0.14 0.16 0.19

Sewage 4-43-0 118.05 6.38 -0.20 -0.27 -0.34 0.35 0.36 0.37

Sewage 4-55-0 7.73 2.09 0.06 0.05 0.04 0.06 0.05 0.05

Long

Tons

Tank Capacities

Zero Trim & Heel

From GHS AddWt runstream Vertical Displ. & VCG Before Adding KMt Change (feet)

Height Above Height of 1600 LT 1750 LT 1950 LT -0.03 -0.03 -0.02

Vertical Baseline 10 LT Added 17.5 ft 16.75 ft 16.25 ft

Location feet inches feet GMt Change (feet) VCG Change (feet)

Pilot House Top (CL) 57 ft 2 5/8 in 60.22 -0.30 -0.27 -0.24 -0.27 -0.25 -0.22

Bridge Deck (CL) 49 ft 2 5/8 in 54.63 -0.26 -0.24 -0.21 -0.23 -0.22 -0.20

Upper Deck (CL) 40 ft 8 5/8 in 43.22 -0.19 -0.18 -0.15 -0.16 -0.15 -0.14

Focsle Deck (CL) 31 ft 11 5/8 in 34.97 -0.14 -0.13 -0.11 -0.11 -0.10 -0.10

Main Deck (CL) 23 ft 2 5/8 in 26.22 -0.09 -0.08 -0.07 -0.05 -0.05 -0.05

Lower Deck 14 ft 17.00 -0.03 -0.03 -0.02 0.00 0.00 0.00

Tank Top (Fr 55-75) 4 ft 7.00 0.02 0.02 0.02 0.07 0.06 0.05

Tank Top (Fr 22-30) 5 ft 8.00 0.03 0.03 0.03 0.06 0.05 0.04

Tank Top (Fr 30-34) 6 ft 9.00 0.03 0.03 0.03 0.05 0.04 0.04

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 24 of 53

6. INSTRUCTIONS TO THE MASTER

6.1 GENERAL

This book is designed to help the ship’s Master maintain the satisfactory stability of his vessel for all conditions by heeding the restrictions as outlined below and by following the instructions for determining the ship’s trim and stability contained in the next section. This manual is not intended to replace the judgment of the person in charge, who must use every means at his/her disposal to ensure that the stability of the vessel is adequate to meet the sea and weather conditions encountered.

It is the Master’s responsibility to maintain the vessel in a satisfactory stability condition at all times, meeting the U.S. Coast Guard wind heel and righting energy requirements as well as a one compartment standard of damage stability per 46 CFR Part 170.

Per 46 CFR 196.15-7, after loading and prior to departure and at other times necessary to assure the safety of the vessel, the Master shall determine that the vessel complies with all applicable stability requirements in the vessel’s Trim and Stability Booklet, Stability Letters, Certificate of Inspection, and Load Line Certificate as the case may be. The vessel may not depart until it is in the compliance with applicable stability requirements. The vessel’s draft, trim, and stability must be determined as necessary. The Master must enter an attestation statement in the log verifying that the vessel complies with the applicable stability requirements at the times specified. Any stability calculations made in support of the determinations must be retained on board for the duration of the voyage.

Compliance with the stability criteria does not prevent capsizing regardless of the circumstance or absolve the

Master of his responsibilities. The Master shall therefore exercise prudence and good seamanship, with regard to the prevailing circumstances, the season of the year, the weather forecasts, and the navigational zone when determining appropriate vessel loading, speed, or course.

The Master shall make every effort to determine the cause of any list of the vessel before taking corrective ac-tion.

6.2 BURN/BALLAST SEQUENCE AND TANK USE

Although there are no restrictions on burn sequence, it is recommended that, when operating in a loading con-dition other than shown on pages 33 through 44, the following sequence be used as a guideline to ensure ade-quate stability down to a fuel load of about 10%.

Diesel Oil Service Tanks (4-75-1, -2) are maintained 50% full at all times.

Departure Condition:

DO service tanks 4-75-1, -2 at 50%

All remaining DO storage tanks at 95%

FW ballast tank 4-22-0 at 100%

FW ballast tank 4-22-2 at 80%

FW ballast tank 4-75-0 at 100%

All remaining FW ballast tanks empty

Roll stabilization tank 3-51-0 at 44%

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

Matthew.Jaskoski Highlight

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 25 of 53

Burn/Ballast Sequence: 100% fuel

(1) Burn from DO storage tank 4-55-1 & -2 until empty, empty forward PW tanks first, then use aft PW tanks to adjust any heel, empty ballast 4-22-0 to trim

77.2% fuel

(2) Burn from DO storage tanks 4-16-1 & -2 until empty, empty aft PW tanks, then use mid PW tanks to adjust any heel

52.9% fuel

(3) Burn from DO storage tanks 4-75-3 & -4 until empty, use mid PW tanks to adjust any heel

38.7% fuel

Time to Refuel! Else,

(4) Burn from DO storage tanks 4-34-1 & -2 until empty, add ballast to 4-75-0 to adjust trim

2.8% fuel

(5) Burn from DO day tanks 4-75-1 & -2 to burnout

0% fuel

6.3 CENTER OF GRAVITY

The natural period of roll of a vessel is inversely proportional to the GMt in any particular loading condition. The curve below indicates the approximate relationship between GMt and period of roll for the NOAA Ship Thomas

Jefferson, and may be used to estimate the GMt when roll period can be measured. Such measurement should only be made under relatively calm conditions when roll is fairly regular and at constant small amplitude. When measuring roll period, always measure the time for several rolls and divide the time by the number of rolls ob-served. The period of a complete roll, such as port, starboard, and back to port, must be used with the curve.

Estimating GMt from the roll period is a means of checking only. It is not intended to take the place of the sta-bility calculations described on pages 44 to 49.

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

Matthew.Jaskoski Highlight

Matthew.Jaskoski Highlight

Matthew.Jaskoski Highlight

Matthew.Jaskoski Highlight

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 26 of 53

6.4 DRAFT AND FREEBOARD

The following figure shows the relative location of the forward draft marks, aft draft marks, and reference points used in the displacement calculation above.

AP FP

Aft Midship Forward

Draft Marks Draft Marks Draft Marks

Determine Displacement and Trim from Observed Drafts

The following procedure describes the method of determining displacement and trim from the observed drafts.

Average port and starboard drafts are used to eliminate the effect of heel.

1. Determine the average of the aft port and starboard drafts (T1). The aft draft marks are centered at

Frame 94.

2. Determine the average of the forward port and starboard drafts (T2). The forward draft marks are con-sidered centered at Frame 0.

3. Calculate the slope of the waterline (m), which equals (T2) minus (T1) divided by the distance between the two drafts. A positive slope indicates forward trim, while a negative slope indicates trim by the stern: m = ( T2 – T1 ) / 188

4. Calculate the draft at the Forward Perpendicular (TFP): TFP = T1

5. Calculate the draft at the Aft Perpendicular (TAP): TAP = m x 190 + T1

6. Calculate the trim (TRIM) in meters over the 190-foot Length Between Perpendiculars (LBP):

TRIM = TAP - TFP

7. Calculate the Midship draft (TMID): TMID = (TFP + TAP) / 2

8. Use the Table of Hydrostatics (page 12) to determine the Longitudinal Center of Flotation (LCF) using the

Midship draft (TMID) as the Mean Draft (Tm). Intermediate values may be interpolated.

9. Calculate the distance between Midship and the LCF (d): d = 95 - LCF

10. Calculate the LCF draft (TLCF): TLCF = d x m + TMID

11. Use the Table of Hydrostatics (page 12) to determine the Displacement (DISPL) at the LCF draft. Inter-mediate values may be interpolated.

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 27 of 53

.0

P T A

TRIM AFT (Feet)

TRIM FWD (Feet)

D R A F T D

IA

G R A M

(S e a W at e r at ft3 /L o ng

To n)

(T rim m e as ur e d o n

LB

P o f 1 fe e t)

LI

G H T

S H

IP

P

LI

M S O

LL

M A R K

F W D D

R A F T M

K

1'

-1 /4

D

IS

P

LA

C E M E N T

L T on s

A F T D

R A F T M

K

' 1 0"

AVERAGE OF AFT DRAFT MARKS (Ft In)

AVERAGE OF FWD DRAFT MARKS (Ft In)

G

IV

E N A

V E R A G E F

W D

A N D A

F T D

R A F T S

F

IN

D D

IS

P

LA

C E M E N T A

N D T

R

IM

1.

C on ne ct t he a ve ra ge

F or w ar d D ra ft

R ea di ng to th e av er ag e A ft D ra ft R ea di ng w ith a s tra ig ht l in e.

2.

R ea d th e di sp la ce m en t w he re th is lin e cr os se s th e

D is pl ac em en t S ca le

3.

D ra w th e "T

R

IM

L

IN

E pa ra lle l t o th is lin e an d pa ss in g th ro ug h

P oi nt A

4.

R ea d th e tri m w he re th e

"T R

IM

L

IN

E cr os se s th e

T R

IM

S C A

LE

G

IV

E N D

IS

P

LA

C E M E N T A N D T R

IM

F

IN

D A

V E R A G E F W

D A N D A

F T D R A F

TS

1.

C on ne ct P oi nt A to th e Tr im

V al ue o n th e

TR

IM

S C A

LE

w ith a st ra ig ht lin e.

Th is i s th e

"T R

IM

L

IN

E

2.

D ra w a s tra ig ht lin e pa ra lle l to t he

TR

IM

LI

N E pa ss in g th ro ug h th e di sp la ce m en t v al ue o n th e

D is pl ac em en t S ca le ex te nd in g to t he

F or w ar d an d

A ft D ra ft

S ca le s.

3.

R ea d th e

A v er ag e F or w ar d an d

A ft D ra fts w he re th is l in e cr os se s th e

D ra ft

S ca le s.

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 28 of 53

Trim shall be minimized. The following graph shows corrections to forward and aft drafts (at the draft marks) for a weight of 10 LT loaded at any location on the vessel.

TRIM TABLE

Example: find the new drafts (at the draft marks) after loading 5 LT centered at Frame 75. Correction in inches

= (Weight / 10 LT) * correction from figure.

Aft Marks (Fr 94)

(feet)

Fwd Marks (FP, Fr 0)

(feet)

Initial Drafts 11.75 12.50

+ Correction 0.09 (1.12 in) -0.04 (-0.49 in)

New Drafts 11.84 12.46

Notes: When offloading, use the same corrections, but reverse the sign.

-3 .0

-2 .0

-1 .0

.0

1.

.0

.0

.0

-3 .0

-2 .0

-1 .0

.0

.0

.0

.0

.0

010 20 30 40 50 60 70 80 90

D R A F T C H A N G E in ch e s)

D R A F T C H A N G E in ch e s)

Frame

S e e A

B S H o u s to n L e tt e r R e f T D a te d

-A

P R

-2

TRIM & STABILITY BOOKLET TJ-079-03 G 04/19/22 29 of 53

6.5 VCG VS. DRAFT CURVES

Based on the stability criteria and the trim of the vessel, the two important stability parameters, VCG and draft, are plotted against each other and presented in the graphs of Item 5. These graphs indicate for any amidships draft and trim, the corresponding maximum allowable vertical center of gravity (VCG) that the vessel may have.

The…