OS-079-002_Rev_D_SETTE_Trim_and_Stability_Book_(ABS_Stamped)_(1)_0001.pdf

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Sarah Bell�

Sarah Bell�

NOAA Ship Oscar Elton Sette TRIM AND STABILITY Dwg:OS-079-002 Rev: D BOOKLET Sheet

Art Anderson Associates, 830 Pacific Avenue, Bremerton WA 98377-1932

REVISIONS

REV ITEM DESCRIPTION DATE APVD

A

1 Changed ships designator from R335 to R334

1/15/03

Miscellaneous corrections as per NOAA T&S Booklet Preliminary Submittal Review dated 12/7/02.

3 Revised Tank Plan.

Removed all "with crane" load cases form examples in the appendices.

Revised all tank characteristics to match tank tables for M/V ADVENTEROUS (Ref 3).

B

Changed operating instruction 12.a. to include tanks 4-60-1-F & 4-60-2-F. 2/4/03

2 Corrected Mission Condition example D4.

C

1 General update through to incorporate the results of a stability test conducted on 2008 Feb 19.

8/5/08

2 Modified example loading conditions to suit revised lightweight characteristics

3 Added Mission Load Worksheet

4 Modified loading condition worksheets and modified Instructions to suit

5 Modified Routine Operating Instructions and added Tank Use and Ballasting Sequence section

6 Added "Action Following Damage" section

D

General update to incorporate the results of a stability test conducted on 2023 April 13.

6/13/24

ACT

(NOAA)

2 Modified example loading conditions to suit revised lightweight characteristics

3 Modified Routine Operating Instructions and added Tank Use and Ballasting Sequence section

Replaced approximate assumed liquid specific volumes (NSTM Chapter 096 values) with actual GAL/LTON specific volumes. Added associated Specific Gravity values.

Removes Ballast Tank 4-52-0 from tank list.

It is considered a VOID.

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Document must be opened with Adobe to view all ABS amendments.

Art Anderson Associates, 830 Pacific Avenue, Bremerton WA 98377-1932

CONTENTS

Sheet No.

References

Objective

General Notes

Table of Equivalents

Principal Characteristics

Routine Operating Instructions

Lifting Equipment

Tank Use and Ballasting Sequence

Instructions for Determining Stability, Trim, and Heel Long Method

Displacement, Center of Gravity, and Free Surface Moment .. 8 Trim Stability Heel

Short Method Stability Trim

Determining Displacement and Trim From Observed Drafts

Action Following Damage

Period of Roll

Hydrostatic Properties

GM Required Curve and GM Available

Draft Diagram

Inboard Profile and Change in GM for Deck Loads

Trim Table

Table of Storage Spaces

Reduction in GM Due to Icing

Tank Location Plan

Tank Capacity Table

Change in GM Due to Emptying/Filling Tanks

Typical Mission Loads Table

Example Loading Conditions L -- Light Ship E -- Extreme Load B1 -- J-Frame Mission ; Full Load Departure B2 -- J-Frame Mission ; Mid-Voyage B3 -- J-Frame Mission ; Arrival C1 -- Long Line Mission ; Full Load Departure C2 -- Long Line Mission ; Mid-Voyage C3 -- Long Line Mission ; Arrival D1 -- Stern Trawling Mission ; Full Load Departure D2 -- Stern Trawling Mission ; Mid-Voyage D3 -- Stern Trawling Mission ; Arrival E1 -- A-Frame Mission ; Full Load Departure E2 -- A-Frame Mission ; Mid-Voyage E3 -- A-Frame Mission ; Arrival

Mission Load Worksheet

Blank Trim and Stability Worksheets

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Art Anderson Associates, 830 Pacific Avenue, Bremerton WA 98377-1932 (2024-06-13)

REFERENCES

1. OS-835-007, Rev C; OSCAR ELTON SETTE Intact Stability Calculations, 10 May 2024

2. OS-835-008, Rev -; OSCAR ELTON SETTE Damage Stability Calculations, 25 June 2008

3. OSCAR ELTON SETTE Incline Test Report, Rev B, 24 May 2023

OBJECTIVE

1. These instructions have been prepared as an aid to operating personnel using this Trim and Stability Booklet to determine the vessel’s operating metacentric height (corrected available GM), trim, heel, and drafts for any condition of loading or operation.

2. It will be the Master’s responsibility to maintain the vessel in a satisfactory stability condition at all times so as to meet the stability requirements as set forth by references 1 and 2.

GENERAL NOTES

1. This Trim and Stability Booklet incorporates data from the intact and damaged stability calculations, references 1 and 2, and the stability test data for the NOAA Ship Oscar Elton Sette conducted on 13 April 2023, Reference 3.

2. All tons used in this booklet are long tons equal to 2,240 pounds.

3. All potable water tanks less than 100% full shall be considered slack unless completely empty. All fuel tanks less than 95% full shall be considered slack unless completely empty.

4. Potable water tanks and fuel settlers shall be considered slack at all times.

5. The Anti-Roll Tank (2-72-0-W) shall contain a maximum of 9,454 gallons (36.11 LTons) of seawater. This corresponds to a maximum load fraction of 43%, or a maximum sounding of 3’-0”.

6. Dumping the Anti-Roll Tank when filled with 36.11 LTons of seawater at all arrival conditions provides approximately one foot of GM and trims the vessel

0.6 feet by the bow. The Anti-Roll Tank (2-72-0-W) empties into the Dump Tank (4-40-0-W) within 15 minutes.

TABLE OF EQUIVALENTS

1 Long LTon = 2240 pounds 1 Cubic foot (CuFt) = 7.48 gallons

Sea Water ≈35.0 CuFt/LTon or 261.865 gal/LTon (1.025 S.G.)

Fresh Water ≈35.9 CuFt/LTon or 268.411 gal/LTon (1.000 S.G.)

Diesel Oil ≈43.0 CuFt/LTon or 321.986 gal/LTon (0.834 S.G.)

Lubricating Oil ≈39.0 CuFt/LTon or 291.387 gal/LTon (0.921 S.G.)

Hydraulic Oil ≈38.5 CuFt/LTon or 288.005 gal/LTon (0.932 S.G.)

Gasoline ≈49.4 CuFt/LTon or 369.495 gal/LTon (0.726 S.G.) Se e

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PRINCIPAL CHARACTERSITCS

Length Overall 224’-0” Length Between Perpendiculars 194’-0” Beam, Max Amidships (molded) 43’-0” Depth, Amidships (molded) 20’-0” Mean Draft, Load Line (molded) 15’-1” Displacement 2304.07 LTons

Light ship characteristics:

Displacement 1,529.62 LTons Vertical Center of Gravity 21.34 feet above baseline Longitudinal Center of Gravity 99.39 feet aft fore perp Transverse Center of Gravity 0.37 feet stbd of centerline

Potable Water Capacity (98%) 4,934 gallons

Ballast Capacity (100%) 126,967 gallons (Fresh Water) 473.03 LTons (Sea Water) 484.86 LTons

Fuel Oil Capacity (95%) 162,341 gallons

504.79 LTons

Gross Tonnage (United States) 1,486.0

Compliment:

Officers and Crew 26 Scientists 20

ROUTINE OPERATING INSTRUCTIONS

1. Cross-connect valve opening and closing should follow these guidelines.

a. The cross-connect valve for each tank pair must be kept closed when the tanks are partially or completely full.

b. The cross-connect valve for tank pairs must be opened when the tanks are empty.

c. The cross-connect valve for a tank pair shall be opened if either tank in the following tank pairs is damaged;

4-23-1-W and 4-23-2-W 4-52-1-F and 4-52-2-F 4-60-1-F and 4-60-2-F 4-72-3-F and 4-72-4-F

2. Excluding the fuel oil service tanks (4-52-3-F and 4-52-4-F) the fewest practical number of tanks shall be slack at any one time. This is in order to minimize the undesirable effect of free surface on stability.

3. Consumable tanks shall be filled or emptied one pair at a time.

4. Bilges and drain wells in machinery spaces shall be kept pumped to minimum content at all times.

5. Fuel oil service tanks (4-52-3-F and 4-52-4-F) should be drawn down LAST.Se e

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6. Seawater Ballast:

a. When seawater ballast must be added during a voyage, it should be coordinated with the drawing of fuel to minimize trim and ensure stability at all times.

b. Ballast tanks should normally be slack only when filling or emptying.

However, ballast tanks may be slack when used as list compensation if calculations show that the loss of GM due to slack-free surface will not reduce GM Available so that GM Margin is negative (less than zero). When not ballasted, all seawater tanks shall be kept pumped periodically to ensure minimum content at all times.

c. During ballasting, a reduction in the vessel's GM due to slack-free surface will occur until the tanks are pressed up. This temporary loss of GM is equal to the seawater-free surface moment of the tank (or tanks), divided by the vessel's displacement at the time of ballasting.

d. When seawater ballast must be added during a voyage, prudent operation dictates that it should be added well in advance of drawing fuel.

Therefore, compensating seawater ballast should be introduced and pressed up prior to the drawing of fuel to minimize free surface loss and ensure adequate stability at all times.

7. If damage to the Motor Room, frames 52-72, occurs, the following action shall be taken:

a. Dump the Anti-Roll Tank (2-72-0-W) immediately into the Anti-Roll Dump Tank (4-44-0-W). (The entire contents of the Anti-Roll Tank should drain into the dump tank within 15 minutes and will change the vessel's trim approximately 0.6 feet by the bow)

8. In the event of damage to the ship in a location other than the Motor Room, frames 52-72, the Anti-Roll Tank (2-72-0-W) can be dumped to the Anti-Roll Dump Tank (4-40-0-W) as a means of increasing the vessels GM. This action will change the vessel's trim approximately 0.6 feet by the bow. Dumping the Anti-Roll Tank is not recommended for the damage conditions where the vessel already has significant trim by the bow or conditions where additional trim by the bow may result in down-flooding of undamaged compartments.

9. NOAA Ship Oscar Elton Sette is fitted with the following deck equipment that is capable of lifting loads with capacities and locations as listed below.

It is necessary to count lifting loads as part of load conditions. Lifting loads have a direct effect on stability and should be operated accordingly within each lifting device's respective capacity.

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LIFTING EQUIPMENT

Equipment Qty Capacity/ Hook Load [pounds]

VCP

[feet]

LCP

[feet]

TCP

[feet]

Stationary Devices Location

TRAWL STANCHION PORT

1 15000 23.75 200.00 -21.25

TRAWL STANCHION STBD 1 15000 23.75 200.00 21.25

Ram Operated Devices Lift Point

J-FRAME STBD 1 3500 33.25 108.00 20.00

J-FRAME PORT 1 3500 50.50 158.00 -31.42

A-FRAME 1 10000 36.00 217.33 0.00

Revolving Boom Devices Center of Swing

BOAT DAVIT @ 12 FT RADIUS 1 8400 38.33 134.00 16.00

UPPER DECK CRANE, MCK1250 @ 10 FT RADIUS 1 20000

20 FT RADIUS 1 12100

30 FT RADUIS 1 7100 38.33 142.00 15.25

40 FT RADIUS 1 5100

50 Fr RADIUS 1 2100

AFT DECK CRANE, K30-35-50 @ 11.4 FT RADIUS 1 14000

20 FT RADIUS 1 14000

40 FT RADIUS 1 14000 31.50 186.00 12.33

45 FT RADIUS 1 10555

50 FT RADIUS 1 10018

VCP = vertical center of Location, Lift Point, or Center of Swing; measured from baseline (+ upward)

LCP = longitudinal center of Location, Lift Point, or Center of Swing;

measured from Fore Perpendicular (+ aft)

TCP = transverse center of Location, Lift Point, or Center of Swing;

measured from centerline (+starboard)

Only one lifting device shall be operated at a time.

TANK USE AND BALLASTING SEQUENCE

As fuel oil tanks are emptied, the vessel's GM is reduced. Filling ballast tanks increases GM. Slack tanks are subject to free surface, which must be accounted for while tanks are being emptied or filled. A suggested burn-ballast sequence is provided below. Other burn-ballast sequences may be used, provided required GM is maintained. Guidance for the approximate change of GM for planning purposes is provided on sheet 23.

Suggest emptying fuel oil tanks in this sequence:

1st 4-06-1-F and 4-06-2-F, 4th 4-60-1-F and 4-72-1-F, 2nd 4-72-3-F and 4-72-4-F, 5th 4-14-1-F and 4-14-2-F 3rd 4-72-2-F to 60% and 4-14-2-F to 80%, Use ballast tanks for heel compensation by filling one side of a pair of tanks.

Minimize use of partially filled ballast tanks. Generally on departure fill ballast tanks 4-86-2-W to 90% to maintain trim with limits. Ballast tanks 4-B-0-W (Forepeak), 4-86-1-W, and 4-86-2-W are most effective for trim and may be adjusted up or down.

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Suggest filling remaining ballast tanks when required in this sequence

1st 4-23-0-W 4th 4-60-0-W 2nd 4-86-1-W 5th 4-23-1-W and 4-23-2-W 3rd 4-86-2-W 6th 4- B-0-W

INSTRUCTIONS FOR DETERMINING STABILITY, TRIM, AND HEEL

Long Method

Displacement, Center of Gravity, and Free Surface Moment:

Displacement, center of gravity, and free surface moment of a proposed loading condition is determined using the blank Loading Summary and Tankage Loading Table sheets as follows. Detailed weights and centers of gravity must be identified for all deadweight on board including liquids in tanks, stores, mission load items, and deck cargo.

1. Liquids in tanks.

a. For each non-empty tank, enter the tank's load fraction (percent full value) on the Tankage Loading Table sheet.

b. Using the tank's load fraction, calculate the weight as follows:

(1) Divide the load fraction percentage by 100 to obtain a decimal value.

(2) Multiply the decimal value load fraction by the 100% capacity in gallons on the Tank Capacity Table on sheet 21 to obtain the tank's load in gallons.

(3) Divide the tank's load in gallons by the density in gallons per LTon from the Table of Equivalents on sheet 4 to obtain the weight of the tank's load.

For example, the weight for DO Storage tank 4-60-2-F at 63% full is computed as follows.

Find decimal value load fraction: 63 / 100 = 0.63

Find tank's load in gallons: 0.63 * 11217 = 7066.7 gal

Find weight of tank's load: 7066.7 / 321.6 = 21.97 LTons

c. Free surface moment.

(1) For all empty tanks enter 0 (zero) in the FS Mom column on the Tankage Loading Table sheet.

(2) For all tanks, except fresh water tanks, which are 100% full enter 0 (zero) in the FS Mom column on the Tankage Loading Table sheet.

For fresh water tanks that are 100% full enter the Slack FS Mom value from the Tank Capacity Table on sheet 21-22.

(3) For all tanks that are slack (less than 95% full) enter the Slack FS Mom value from the Tank Capacity Table on sheet 21-22 in the FS Mom column on the Tankage Loading Table sheet.

The following tanks should be considered slack in all loading conditions.

DO Service tank 4-52-3-F DO Service tank 4-52-4-F Main Fresh Water tank 3½-52-1-W Aux Fresh Water tank 3½-52-2-W

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(4) For all other tanks enter the Full FS Mom value from the Tank Capacity Table on sheet 21 in the FS Mom column on the Tankage Loading Table sheet.

d. Multiply the weight by the VCG, LCG, and TCG to obtain the vertical moment (VMOM), longitudinal moment (LMOM), and transverse moment (TMOM) for each tank.

e. For each liquid type (diesel oil, SW ballast, fresh water, lube oil, anti-roll, or misc) sum the weight, VMOM, LMOM, TMOM, and FS Mom.

Divide the sum of VMOM, LMOM, and TMOM by the sum of the weight to obtain the total VCG, LCG, and TCG.

If the total FS Mom for each consumable liquid type is less than the minimum value listed below enter the minimum FS Mom value from the list below in place of the computed total.

Fuel Oil 264.53 ft-tons Fresh Water 44.95 ft-tons Lube Oil 1.60 ft-tons Anti-Roll (when active) 1860.93 ft-tons Miscellaneous 60.09 ft-tons

f. Copy the sum of the weight, VCG, LCG, TCG, and sum of VMOM, LMOM, TMOM, and FS Mom for each liquid type (diesel oil, SW ballast, fresh water, lube oil, or misc) to the appropriate line on the Loading Summary sheet.

2. Stores.

Enter the percent load for PROVISIONS & STORES. Calculate the weight of stores as:

PROVISIONS & STORES weight = percent load * 16.65 / 100

Multiply the weight by the VCG, LCG, and TCG to obtain the vertical moment (VMOM), longitudinal moment (LMOM), and transverse moment (TMOM) for each stores item.

3. Mission load items.

NOAA Ship Oscar Elton Sette operates with many different mission configurations; four of which are identified as standard mission loads for this booklet. Mission load breakdowns for these four standard mission loads (A-Frame, Long Line Fishing, Stern Trawling, and J-Frame mission configurations) are shown on sheet 24.

If the proposed loading condition includes one of the standard mission loads (e.g. A-Frame, Long Line Fishing, Stern Trawling, or J-Frame), whose breakdown is shown on sheet 23, copy the total weight, VCG, vertical moment (VMOM), LCG, longitudinal moment (LMOM), TCG, and transverse moment (TMOM) to the MISSION LOAD line on the Loading Summary sheet.

Mission load item values for other mission configurations can be determined using the Mission Load Worksheet (sheet 52) as follows.

a. Place a check mark in the "On Board" column next to any standard item to be carried.

b. Copy the weight of all checked items to the "LOAD" column.

c. Under "OTHER ITEMS" list all non-standard mission load items such as scientific equipment, extra mission related spare parts, and the like.

Include each item's weight in the "LOAD" column and each item's VCG, LCG, and TCG in the associated column.

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d. Calculate each load's vertical moment, longitudinal moment, and transverse moment by multiplying its weight by its VCG, LCG, and TCG respectively.

e. Sum all entries in the "LOAD", vertical moment, longitudinal moment, and transverse moment columns to obtain the total mission load weight and moments.

f. Divide the total vertical moment by the total weight to obtain mission load VCG. Divide the total longitudinal moment by the total weight to obtain mission load LCG. Divide the total transverse moment by the total weight to obtain mission load TCG.

g. Copy the total weight, VCG, vertical moment (VMOM), LCG, longitudinal moment (LMOM), TCG, and transverse moment (TMOM) to the MISSION LOAD line on the Loading Summary sheet.

4. Miscellaneous deadweight and deck cargo.

a. Enter miscellaneous deadweight and deck cargo load information not covered elsewhere on the Loading Summary sheet. In addition to deck cargo these items could include additional scientific equipment, miscellaneous project gear, and the like. The information needed is:

description, weight, vertical center of gravity (VCG), longitudinal center of gravity (LCG), and transverse center of gravity (TCG). If the miscellaneous deadweight load item contains a liquid loading the free surface moment (FS Mom) is also needed.

b. Calculate each load's vertical moment (VMOM), longitudinal moment (LMOM), and transverse moment (TMOM) by multiplying its weight by its VCG, LCG, and TCG respectively.

5. Sum all weights, vertical moments, longitudinal moments, transverse moments, and free surface moments on the Loading Summary sheet, including light ship values.

The sum of weights is the proposed loading condition's displacement

(DISPL).

The sums of moments are the proposed loading condition's total vertical moment (VMOM), total longitudinal moment (LMOM), total transverse moment (TMOM), and total free surface moment (FS Mom).

6. Divide the total vertical moment (VMOM) by the displacement (DISPL) to obtain the proposed loading condition's VCG. Divide the total longitudinal moment (LMOM) by the displacement (DISPL) to obtain the proposed loading condition's LCG. Divide the total transverse moment (TMOM) by the displacement (DISPL) to obtain the proposed loading condition's TCG.

Trim:

Trim and drafts of a proposed loading condition are determined using the blank Loading Summary sheet as follows. Before trim and drafts can be determined, the proposed loading condition's displacement (DISPL) and total longitudinal center of gravity (LCG) must be determined using the methods previously presented.

1. Using the proposed loading condition's displacement (DISPL) find the baseline mean draft (Tm), longitudinal center of buoyancy (LCB), longitudinal center of flotation (LCF), transverse metacenter height above baseline (KMt) and longitudinal metacenter height above baseline (KML) from the table of Hydrostatic Properties on sheet 14. Input the Hydrostatic properties for the closest tabulated displacements (both higher and lower displacements) on sheet 14. Interpolate the intermediate values at the loading conditions displacement (DISPL).

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2. Calculate the trimming lever (TL) as:

TL = LCG - LCB

3. Calculate the moment to alter trim one inch (MT1) as:

MT1 = (KML - VCG) * DISPL / (12 * LBP) NOTE: LBP = 194.00

4. Calculate TRIM.

The moment causing the vessel to trim is the displacement (DISPL) multiplied by the trimming lever (TL). This trimming moment divided by 12 times the MT1 gives the total trim in feet. Trim will be forward (-) if LCG is forward of LCB and aft (+) if the opposite is true.

TRIM = (DISPL * TL) / (12* MT1)

5. Determine drafts.

Baseline drafts midships at the Plimsoll mark (Tx), at the forward draft marks (DMfwd), and at the aft draft marks (DMaft) are found as follows (all dimensions are in feet).

DMfwd = Tm + (TRIM * ( 10.00 – LCF) / LBP) Note: LBP = 194.00 Tx = Tm + (TRIM * ( 97.00 - LCF) / LBP) DMaft = Tm + (TRIM * (196.00 - LCF) / LBP)

Navigational or keel draft is equal to the baseline draft plus 9/16 inch, or 0.05 feet.

Stability:

Stability characteristics of a proposed loading condition are determined using the blank Loading Summary sheet as follows. Before stability characteristics can be determined the proposed loading condition's Displacement (DISPL), total vertical center of gravity (VCG), and total free surface moment (FS Mom) must be determined using the methods presented above.

1. Using the proposed loading condition's displacement (DISPL) find the baseline mean draft (Tm) and the transverse metacenter height above baseline (KMt) from the table of Hydrostatic Properties on sheet 14.

Intermediate values can be determined by interpolation.

2. Calculate the uncorrected metacentric height (GM) as:

GM = KMt – VCG

3. Calculate the free surface correction (FS Corr) as:

FS Corr = FS Mom / DISPL

4. Calculate the available metacentric height (GM Available) corrected for free surface as:

GM Available = GM – FS Corr

5. Using the baseline mean draft (Tm) and TRIM find the minimum GM Required from the graph of GM Required Curves on sheet 15.

6. Compare the GM Available to the minimum GM Required by calculating the GM Margin as follows:

GM Margin = GM Available – GM Required

The GM Margin must be positive (greater than zero) at all times.

Heel:

Heel (list) of a proposed loading condition is determined, if desired, using

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2- Ju l-2 the blank Loading Summary sheet as follows. Before heel can be determined the proposed loading condition's displacement (DISPL), GM Available, and total transverse moment (TMOM) must be determined using the methods previously presented.

1. Calculate the heeling moment that would cause one degree of heel (MH1) as:

MH1 = 0.01745 * GM Available * DISPL

2. Calculate the angle of heel by dividing the total transverse moment (TMOM) by MH1. Port heel is indicated algebraically by (-), starboard by (+).

Short Method:

Stability:

For minor changes from any tabulated loading condition (sheets 25 through 50), the GM Available may be determined by applying GM corrections outlined in the tables on sheets 17 and 22. This method is fast and reasonably accurate in evaluating a loading condition that is similar to one of the representative conditions shown in this booklet.

Trim:

The effect on trim of minor changes from the representative loading conditions can be estimated from the trim table on sheet 18. This method is sufficiently accurate for practical purposes in predicting trim for a loading condition that is similar to one of the representative conditions shown in this booklet.

DETERMINING DISPLACEMENT AND TRIM FROM OBSERVED DRAFTS

The ship's displacement and trim can be determined from observed draft mark readings using the draft diagram on sheet 16. Instructions are provided on the diagram. The draft diagram must be used with the average of port and starboard draft readings to eliminate the effect of heel.

ACTION FOLLOWING DAMAGE

Most of the foregoing discussion applies to the intact properties of the vessel.

In the event of underwater damage or entry of water through the weather envelope, stability and trim will be affected by the consequent flooding of spaces within the vessel.

While there are no regulatory criteria in the case of this vessel for subdivision or for stability after damage, the following should be noted.

The response of the vessel to flooding will depend on the draft, intact trim, and stability characteristics existing immediately prior to the incident, and the condition of the tanks, if any, involved in the flooding. The routine operating instructions tabulated above are designed to reduce the trim and list resulting from such flooding and to reduce the amount of corrective action to be taken in the inevitable period of confusion following such an incident.

Entry of a significant amount of water into any part of the vessel should be regarded as an emergency situation and appropriate measures should be taken promptly. These would normally include the following:

1. Call for assistance.

2. Alert vessel personnel to the situation.

3. Open cross-connections between pairs of tanks that have been damaged.

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4. Favor stability in handling the vessel. Head into the wind and sea if possible. Avoid hard turns.

5. Determine the source of flooding and the spaces affected or likely to be affected.

6. Activate the bilge system, emergency generator, and other emergency systems as required.

7. Establish flooding boundaries by shoring or patching, to prevent or limit progressive flooding.

In general, if trim and list reach a steady state with no further increases, chances of survival will be good. Further action will depend upon the degree of improvement in the vessel's attitude deemed necessary in the circumstances. For example, if the main deck aft is heavily awash, trimming by the head may be considered. If the vessel lists heavily as a result of unsymmetrical flooding, list correction may be undertaken.

Trim and list correction should generally be made by shifting liquids already on board rather than by taking on water ballast, which will increase the draft and reduce the reserve buoyancy. When shifting liquids, the following precautions should be observed:

1. DO NOT attempt to correct a list by shifting liquids if any of the signs of low or negative GM are present. These signs include:

a. a slow, erratic period of roll;

b. failure to return to upright after rolling to one side; and

c. listing alternatively to port and starboard.

2. If, and only if, it can be positively determined that a list is due to unsymmetrical flooding and that the vessel has a positive GM, list correction by shifting of liquids may be undertaken slowly and cautiously.

3. Take suction from tanks which are already slack rather than tanks that are full. This will minimize the increase in free surface effect.

4. Discharge to tanks which are slack, rather than empty, and preferably those that are nearly full. Press up into vent lines.

5. Favor improvements of trim, if possible, when selecting tanks for transfer.

Minor improvements in stability may also be accomplished by lowering movable weights. For example, cranes, if initially up in the working position, may be lowered to the fully-down position. In cases where survival takes precedence over all other considerations, heavy gear may be jettisoned, working from the upper decks down. Jettisoning is a slow and laborious operation and the improvement obtained will usually be small, therefore, it should be considered only in an extreme situation.

PERIOD OF ROLL

The natural period of roll of a vessel is inversely proportional to the GMt in any particular loading condition. The equation below indicates the approximate relationship between GMt and period of roll for NOAA Ship Oscar Elton Sette, and may be used to estimate the GMt when roll period can be measured. Such a 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 by the number of rolls observed. The period of a complete roll, such as port to starboard and back to port, must be used in the equation.

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GM = (496.98) / T2 ; T = period of roll

The value (496.98) was determined from measurements taken during the 20 June 2002 stability test.

Estimating GMt from the roll period is a means of checking only. It is not intended to take the place of the calculations described on sheets 8 through 12.

HYDROSTATIC PROPERTIES

Mean Draft

Displ LCB VCB TPI LCF MT1 KML KMT

[ft] [LT] [ft] [ft] [LT] [ft] [ft-LT] [ft] [ft]

10.00 1269.48 96.38 5.98 15.09 100.88a 163.49 299.8 24.05

10.25 1315.08 96.55 6.12 15.26 101.37a 168.26 297.9 23.86

10.50 1361.11 96.72 6.27 15.43 101.82a 172.86 295.7 23.72

10.75 1407.69 96.90 6.41 15.61 102.34a 177.98 294.3 23.57

11.00 1454.82 97.09 6.56 15.79 102.84a 183.11 293.0 23.45

11.25 1502.48 97.28 6.70 15.98 103.40a 188.74 292.4 23.34

11.50 1550.71 97.48 6.85 16.16 103.94a 194.20 291.5 23.24

11.75 1599.55 97.69 6.99 16.37 104.59a 200.66 292.0 23.20

12.00 1649.01 97.91 7.14 16.60 105.35a 208.14 293.8 23.14

12.25 1699.22 98.14 7.29 16.87 106.32a 217.37 297.8 23.13

12.50 1750.06 98.39 7.43 17.08 107.01a 224.67 298.9 23.08

12.75 1801.64 98.64 7.58 17.33 107.98a 234.16 302.6 23.04

13.00 1854.04 98.93 7.73 17.58 109.02a 244.48 307.0 22.99

13.25 1906.94 99.21 7.88 17.68 109.27a 248.30 303.1 22.86

13.50 1960.14 99.49 8.03 17.79 109.53a 252.22 299.6 22.75

13.75 2013.66 99.76 8.18 17.89 109.81a 256.37 296.4 22.64

14.00 2067.48 100.02 8.33 17.99 110.07a 260.30 293.1 22.55

14.25 2121.59 100.28 8.48 18.09 110.34a 264.30 290.0 22.46

14.50 2176.01 100.53 8.62 18.19 110.60a 268.32 287.1 22.38

14.75 2230.71 100.78 8.77 18.28 110.86a 272.35 284.2 22.31

15.00 2285.69 101.03 8.92 18.37 111.08a 276.11 281.2 22.24

15.08 2304.07 101.11 8.97 18.40 111.18a 277.62 280.5 22.22

15.25 2340.94 101.27 9.06 18.46 111.35a 280.32 278.8 22.18

15.50 2396.47 101.51 9.21 18.56 111.59a 284.39 276.3 22.12

15.75 2452.26 101.74 9.36 18.64 111.82a 288.40 273.8 22.07

16.00 2508.31 101.96 9.5 18.73 112.03a 292.34 271.3 22.01

16.25 2564.57 102.19 9.65 18.79 112.15a 295.63 268.4 21.94

16.50 2621.04 102.40 9.79 18.85 112.23a 298.55 265.2 21.86

16.75 2677.61 102.61 9.94 18.87 112.13a 299.86 260.7 21.76

17.00 2734.25 102.80 10.08 18.89 112.03a 301.22 256.5 21.67 Drafts are from baseline.

MT1 is calculated with KG = 0.

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DOES NOT MEET

STABILITY CRITERIA

MEETS STABILITY

CRITERIA

[Summer Load Line (15'-1")]

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INBOARD PROFILE AND CHANGE IN GM FOR DECK LOADS

VERTICAL LOCATION

VERTICAL

HEIGHT

OF

ADDED

WEIGHT

[ft]

Displacement & VCG Before Adding Weight

1600 LT 1700 LT 1800 LT 1900 LT 2000 LT 2100 LT 2200 LT

20.00' 19.50' 19.00' 18.50' 18.00' 17.50' 17.00'

GM CHANGE (feet) per 10 LT Added

Pilothouse Roof 58.00 -0.25 -0.25 -0.23 -0.23 -0.22 -0.20 -0.20

Bridge Deck 49.50 -0.19 -0.20 -0.18 -0.18 -0.18 -0.16 -0.16

Upper Deck @ FR 0 41.33 -0.14 -0.15 -0.13 -0.14 -0.14 -0.12 -0.12

Upper Deck Aft FR 44 + 3" 40.33 -0.14 -0.14 -0.13 -0.13 -0.13 -0.12 -0.12

Top of Lab 41.33 -0.14 -0.15 -0.13 -0.14 -0.14 -0.12 -0.12

Fcsle Deck @ FR 0 32.83 -0.09 -0.10 -0.09 -0.10 -0.09 -0.08 -0.08

Fcsle Deck Aft of

FR 44 + 3" 31.83 -0.08 -0.09 -0.08 -0.09 -0.09 -0.08 -0.08

Mission Deck Aft FR 86 27.00 -0.05 -0.06 -0.05 -0.06 -0.06 -0.06 -0.06

Main Deck @ FR 0 24.00 -0.03 -0.05 -0.04 -0.05 -0.05 -0.04 -0.04

Main Deck Aft of

FR 44 + 3" 23.00 -0.03 -0.04 -0.03 -0.04 -0.04 -0.04 -0.04

Lower Platform 13.00 +0.03 +0.02 +0.02 0.01 0.00 0.01 0.01

Hold 7.50 +0.07 +0.05 +0.05 0.04 0.03 0.04 0.03

Frame spacing is 24" throughout.

Upper, Fcsle, & Main decks include straight sheer forward of 3" aft of Fr 44.

Added weight is assumed located 3 feet above the deck Se e

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TRIM TABLE

DIRECTIONS:

1. The above table shows the correction to the drafts forward and aft for a weight of 100 LTons loaded at any location on the vessel.

2. The above table is based on an initial mean draft of approximately 14 feet.

3. When discharging, reverse the numeric signs.

EXAMPLE:

Find the new drafts at the draft marks after loading 50 LTons at frame 75.

CORRECTION = ((Weight of Load) / 100 LTons ) x (Change in Draft at Applied Load)

AFT MARKS FWD MARKS

Initial Draft (ft) 13.84 13.65

Correction (ft) 0.51 -0.12

Corrected Draft (ft) 14.35 13.53

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TABLE OF STORAGE SPACES

REDUCTION IN GM DUE TO ICING

If ice were to accumulate on the ship, its weight and naturally high VCG reduces the vessel's GM. Guidance for the approximate change in GM for two conditions of icing is provided below. Interpolation or extrapolation may be used to estimate the effect upon GM of other icing conditions.

LOCATION OF ICING DECK LOADS

ICE ACCUMULATION

ESTIMATE VCG (ft) OF ICE LOAD

FOR VARIOUS LOADING CONDITIONS

10% FULL 30% FULL 80% FULL FULL

ALL THICKNESSES 37.50 38.50 40.40 40.60

NOTE: LCG is assumed 72.0 ft aft of FP, TCG 0.0 ft, for all loading conditions

REDUCTION IN GM

ICE ACCUMULATION REDUCTION IN GM [ft] DUE TO ICE LOAD FOR VARIOUS

DISPLACEMENTS [LT]

THICKNESS

[in]

WEIGHT

[LT] 1900 2000 2200 2300

0.32 14.60 0.15 0.16 0.15 0.14

0.64 29.60 0.30 0.31 0.29 0.28

NOTES:

1. Use ice thickness on horizontal surfaces in estimating reduction in GM.

2. Ice on vertical surfaces is assumed to be one half the thickness of ice on horizontal surfaces.

3. Reduction in GM for other thickness of ice may be interpolated or extrapolated.

Compartment Location Capacity VCG LCG TCG

No. Frames ft3 ft ABL ft aft FP ft stbd

Boatswains Storeroom Focsle 01-E-0-A E-2 1550 34.20 -3.30 0.00 Engineers Storeroom #1 Focsle 01-0-2-A 1-5 1060 33.90 7.10 -8.00 Stewards Storeroom #1 Focsle 01-2-1-A 2-5 790 34.00 8.20 8.00 Baggage Storage Focsle 01-30-1-A 30-32 150 33.40 62.30 2.50 Stewards Storeroom #2 Main 1-E-0-A E-6 2000 25.40 5.70 0.00 Dry Provisions Storeroom Main 1-6-3-A 6-14 1500 25.20 21.90 8.00 Chill Room Main 1-14-1-A 14-18.5 840 25.10 32.50 8.50 Thaw Room Main 1-16-1-A 17-20.5 275 25.00 36.00 9.50 Freeze Room Main 1-18-1-A 18.5-23 1145 24.90 41.70 9.00 Paint Locker Main 1-65-2-Q 65-67 350 24.20 132.00 -9.00 Storeroom Main 1-75-0-O 75-78 575 24.00 153.00 6.00 Engineers Storeroom #2 Lower 2-28-1-A 28-34 740 15.20 63.10 7.50 Boatswains Storeroom Lower 2-77-1-O 77-86 2120 16.00 163.00 12.70

SPACE DECK

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TANK LOCATION PLAN

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TANK CAPACITY TABLE

100% Cap Weight VCG LCG TCG

[gal] [LTon] [feet] [feet] [feet] Full Slack

Diesel Oil Tanks (SG=0.834)

DO Storage 4-06-1-F 13,843 95 40.84 11.97 21.98 5.97 37.86 37.16

DO Storage 4-06-2-F 13,843 95 40.84 11.97 21.98 -5.97 37.86 37.16

DO Storage 4-14-1-F 25,996 95 76.70 10.61 37.78 9.29 38.36 130.37

DO Storage 4-14-2-F 25,996 95 76.70 10.61 37.78 -9.29 38.36 130.37

DO Storage 4-52-1-F 3,239 95 9.56 3.02 112.00 12.40 5.49 26.07

DO Storage 4-52-2-F 3,239 95 9.56 3.02 112.00 -12.40 5.49 26.07

DO Service 4-52-3-F 7,092 95 20.92 12.10 112.00 19.28 2.00 1.90

DO Service 4-52-4-F 6,388 95 18.85 11.31 112.00 -19.25 2.00 1.90

DO Storage 4-60-1-F 12,008 95 35.43 9.07 133.47 16.74 2.20 69.63

DO Storage 4-60-2-F 11,217 95 33.10 8.35 133.36 -16.55 2.20 70.03

DO Storage (Inbd) 4-72-1-F 11,000 95 32.45 8.08 159.35 5.19 21.18 33.87

DO Storage (Inbd) 4-72-2-F 13,894 95 40.99 8.15 156.90 -4.54 31.77 50.85

DO Storage (Outbd) 4-72-3-F 11,565 95 34.12 8.89 155.33 14.99 27.67 61.74

DO Storage (Outbd) 4-72-4-F 11,565 95 34.12 8.89 155.33 -14.99 27.67 61.74

Total: Diesel Oil 170,885 504.19 9.78 90.31 0.14 280.12 738.86

264.53

Lube Oil Tanks (SG=0.921)

LO Storage 2-60-1-F 1,056 95 3.44 17.00 123.00 19.50 0.80 0.80

LO Storage 2-60-2-F 792 95 2.58 16.25 123.00 -19.50 0.80 0.80

LO Storage 3-54-2-F 250 95 0.82 6.63 111.00 -16.25 0.20 0.20

Total: Lube Oil 2,098 6.84 15.48 121.57 0.52 1.80 1.80

1.60

Ballast Tanks (SG=1.000)

Forepeak 4- B-0-W 8,969 100 33.42 15.11 7.79 0.00 35.22 78.66

23 S Ballast 4-23-1-W 11,728 100 43.69 6.46 58.07 13.14 40.73 75.35

23 P Ballast 4-23-2-W 12,044 100 44.87 6.48 57.79 -13.03 41.24 80.77

23 C Ballast 4-23-0-W 18,456 100 68.76 5.36 57.38 -1.03 115.98 161.63

60 C Ballast 4-60-0-W 10,159 100 37.85 2.58 131.27 -0.08 32.01 210.19

86 S Ballast 4-86-1-W 19,503 100 72.66 14.88 179.44 11.30 99.63 281.43

86 P Ballast 4-86-2-W 23,316 100 86.87 15.18 179.53 -9.86 130.03 358.88

Aftpeak S 3-94-1-W 11,396 100 42.46 16.20 197.55 11.03 95.62 198.86

Aftpeak P 3-94-2-W 11,396 100 42.46 16.20 197.55 -11.03 95.62 198.86

Total: Ballast 126,967 473.03 11.25 126.23 -0.25 686.06 1,644.62

Anti-Roll Tanks (SG=1.000)

Anti-Roll 2-72-0-W 21,819 43 35.22 16.27 149.05 -0.06 162.23 1,860.93

Anti-Roll Dump 4-40-0-W 9,550 99 35.22 2.45 90.02 0.00 30.50 191.73

31,369 70.44 9.36 119.54 -0.03 192.74 2,052.66

1,860.93

FS Mom [ft-LT] TANK Compt No %

Total: Anti-Roll Tk

FS Group Min =

FS Group Min =

FS Group Min =

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TANK CAPACITY TABLE (CONT.)

100% Cap Weight VCG LCG TCG

[gal] [LTon] [feet] [feet] [feet] Full Slack

Anti-Roll Tanks (SG=1.000)

Anti-Roll 2-72-0-W 21,819 43 35.22 16.27 149.05 -0.06 162.23 1,860.93

Anti-Roll Dump 4-40-0-W 9,550 99 35.22 2.45 90.02 0.00 30.50 191.73

31,369 70.44 9.36 119.54 -0.03 192.74 2,052.66

1,860.93

Fresh Water Tanks (SG=1.000)

FW Storage 3½-52-1-W 2,467 100 9.19 7.74 112.00 4.25 4.31 22.47

FW Storage 3½-52-2-W 2,467 100 9.19 7.74 112.00 -4.25 4.31 22.47

Total: Fresh Water 4,934 18.38 7.74 112.00 0.00 8.63 44.95

44.95

Miscellaneous Tanks (SG=1.025, unless noted otherwise)

Waste Water 3-23-1-W 318 100 1.21 7.29 48.00 9.00 0.10 0.10

Oily Waste 4-60-3-F 1,598 95 5.80 8.89 123.00 19.13 0.90 0.90

Oily Waste 4-60-4-F 1,598 95 5.80 8.89 123.00 -19.13 0.90 0.90

Sludge (SG=0.921) 3-50-2-F 89 100 0.31 5.41 101.00 -9.96 0.10 0.60

Sewage Holding 4-25-0-W 4,801 98 17.97 13.40 43.02 0.01 21.40 57.59

Total: Misc Tanks 8,404 31.08 11.40 73.62 0.26 23.40 60.09

60.09

FS Mom [ft-LT] TANK Compt No %

VCG measured from baseline (+ upward)

LCG measured from Fore Perpendicular (+ aft)

TCG measured from centerline (+starboard)

Total: Anti-Roll Tk

FS Group Min =

FS Group Min =

FS Group Min =

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CHANGE IN GM DUE TO EMPTYING/FILLING TANKS

The effect on GM due to filling tanks can be estimated from the following table.

This table is a guide to aid in selecting tanks to be filled and is not intended as a substitute for detailed loading calculations. For emptying tanks, the change in GM will be the same as for weight added, but with the sign reversed.

Liq TANK TONS

ADDED

Displ & VCG Before Filling Tank

1600 LT 1700 LT 1800 LT 1900 LT 2000 LT 2100 LT 2200 LT

20.00' 19.50' 19.00' 18.50' 18.00' 17.50' 17.00'

GM CHANGE (feet)

DO DO Stor 4-06-1-F 40.84 +0.14 +0.12 +0.10 +0.03 +0.02 +0.03 +0.03 DO DO Stor 4-06-2-F 40.84 +0.14 +0.12 +0.10 +0.03 +0.02 +0.03 +0.03 DO DO Stor 4-14-1-F 76.70 +0.29 +0.23 +0.15 +0.07 +0.07 +0.07 +0.05 DO DO Stor 4-14-2-F 76.70 +0.29 +0.23 +0.15 +0.07 +0.07 +0.07 +0.05 DO DO Stor 4-52-1-F 9.56 +0.07 +0.06 +0.06 +0.04 +0.04 +0.04 +0.04 DO DO Stor 4-52-2-F 9.56 +0.07 +0.06 +0.06 +0.04 +0.04 +0.04 +0.04 DO DO Svce 4-52-3-F 20.92 +0.07 +0.07 +0.06 +0.02 +0.02 +0.02 +0.03 DO DO Svce 4-52-4-F 18.85 +0.07 +0.07 +0.06 +0.03 +0.02 +0.03 +0.03 DO DO Stor 4-60-1-F 35.43 +0.15 +0.14 +0.11 +0.06 +0.05 +0.06 +0.05 DO DO Stor 4-60-2-F 33.10 +0.15 +0.14 +0.12 +0.06 +0.06 +0.06 +0.06 DO DO Stor 4-72-1-F 32.45 +0.18 +0.16 +0.15 +0.09 +0.08 +0.09 +0.07 DO DO Stor 4-72-2-F 40.99 +0.23 +0.20 +0.17 +0.10 +0.09 +0.10 +0.09 DO DO Stor 4-72-3-F 34.12 +0.15 +0.14 +0.12 +0.06 +0.06 +0.06 +0.06 DO DO Stor 4-72-4-F 34.12 +0.15 +0.14 +0.12 +0.06 +0.06 +0.06 +0.06 SW Forepeak 4- B-0-W 33.42 +0.01 +0.01 +0.00 -0.06 -0.06 -0.05 -0.05 SW SW Blst 4-23-1-W 43.69 +0.27 +0.25 +0.21 +0.14 +0.14 +0.14 +0.13 SW SW Blst 4-23-2-W 44.87 +0.28 +0.26 +0.22 +0.14 +0.13 +0.14 +0.12 SW SW Blst 4-23-0-W 68.76 +0.47 +0.39 +0.32 +0.24 +0.22 +0.22 +0.19 SW SW Blst 4-52-0-W 37.85 +0.18 +0.17 +0.15 +0.09 +0.09 +0.10 +0.09 SW SW Blst 4-60-0-W 72.66 +0.24 +0.23 +0.19 +0.12 +0.12 +0.12 +0.11 SW SW Blst 4-86-1-W 86.87 +0.01 -0.04 -0.11 -0.17 -0.15 -0.14 -0.15 SW SW Blst 4-86-2-W 42.46 -0.02 -0.06 -0.16 -0.22 -0.21 -0.19 -0.21 SW Aftpeak 3-94-1-W 42.46 -0.07 -0.07 -0.09 -0.15 -0.14 -0.13 -0.12 SW Aftpeak 3-94-2-W 33.42 -0.07 -0.07 -0.09 -0.15 -0.14 -0.13 -0.12 SW Sew Hldg 4-25-0-W 17.97 +0.02 +0.01 +0.00 -0.02 -0.03 -0.01 -0.02

LO SLUDGE 3-50-2-F +0.31 +0.00 +0.00 +0.00 +0.00 +0.00 +0.00 +0.00

FW FW Stor 3½-52-1-W +9.19 +0.05 +0.03 +0.03 +0.02 +0.02 +0.02 +0.02 FW FW Stor 3½-52-2-W +9.19 +0.05 +0.03 +0.03 +0.02 +0.02 +0.02 +0.02

Diesel oil tanks are filled to 95% capacity Seawater tanks are filled to 100% capacity Fresh water tanks are filled to 100% capacity Includes GM loss due to free surface during tank filling

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On WEIGHT LOAD

ITEM Board (Tons) (Tons) Lever Moment Lever Moment Lever Moment

A-Frame Operations Net, Mochness 1 0.54 0.54 40.00 21.60 196.00 105.84 0.00 0.00 Rosette Frame (AOML) 1 0.83 0.83 27.00 22.41 198.00 164.34 0.00 0.00 SSE Deck Van 1 0.89 0.89 27.60 24.56 182.67 162.58 11.00 9.79 SSE Submersible 1 1.47 1.47 27.00 39.69 190.00 279.30 0.00 0.00 Trawl Blocks 1 0.45 0.45 34.00 15.30 201.00 90.45 0.00 0.00

Totals: 4.18 29.56 123.56 191.99 802.51 2.34 9.79

Long Line Operations Rosette Frame (P Lab) 1 0.09 0.09 31.00 2.79 154.00 13.86 19.50 1.76 Trawl Blocks 1 0.45 0.45 34.00 15.30 201.00 90.45 0.00 0.00

Totals: 0.54 33.50 18.09 193.17 104.31 3.25 1.76

Stern Trawling Operations Net, Stern Trawl 1 1.07 1.07 32.25 34.51 182.00 194.74 0.00 0.00 Net, Stern Trawl (Spare) 1 1.07 1.07 21.00 22.47 144.00 154.08 0.00 0.00 Rosette Frame (P Lab) 1 0.09 0.09 31.00 2.79 154.00 13.86 19.50 1.76 Trawl Blocks 1 0.45 0.45 34.00 15.30 201.00 90.45 0.00 0.00 Trawl Doors 1 1.71 1.71 26.00 44.46 201.00 343.71 0.00 0.00

Totals: 4.39 27.23 119.53 181.51 796.84 0.40 1.76

J-Frame Operations Net, Mochness 1 0.54 0.54 40.00 21.60 196.00 105.84 0.00 0.00 Rosette Frame (AOML) 1 0.83 0.83 27.00 22.41 198.00 164.34 0.00 0.00 Trawl Blocks 1 0.45 0.45 34.00 15.30 201.00 90.45 0.00 0.00

Totals: 1.82 32.59 59.31 198.15 360.63 0.00 0.00

TYPICAL MISSION LOADS TABLE

VCG

Above BL

LCG

Aft FP

TCG

from CL (+S, -P)

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NOAA Ship Oscar Elton Sette TRIM & STABILITY Rev: D BOOKLET Sheet 25

CONDITION:

WEIGHT FS Mom ITEM % (LT) Lever Moment Lever Moment Lever Moment (Ft-tons )

CREW & EFFECTS

CONSTANT STORES

Bosun Stores Engineer Stores Stewards Stores Scientific Stores

PROVISIONS & STORES

TANKAGE

Total: Diesel Oil Total: Lube Oil Total: Ballast Total: Anti-Roll Tanks Total: Fresh Water Total: Miscellaneous Tanks

MISSION LOAD

LIGHT SHIP 1529.62 21.34 32642.1 99.39 152029 0.37 565.96

TOTAL DISPLACEMENT 1529.62 21.34 32642.1 99.39 152029 0.37 565.96 0.0

Disp Tm LCB KML LCF KMt GMreq.

1502.48 11.25 97.28 292.40 103.40 23.34 2.99

1529.62 11.39 97.39 291.89 103.70 23.28 2.94

1550.71 11.50 97.48 291.50 103.94 23.24 2.90

(Tm) 11.39 Feet (LCG) 99.39 Feet (LCB) 97.39 Feet (TL) 2.00 Feet (KML) 291.89 Feet (MT1) 177.77 Ft-tons (TRIM) 1.43 Feet (LCF) 103.70 Feet (DMfwd) (Tx) (DMaft)

(KMt) 23.28 Feet (VCG) 21.34 Feet (GM) 1.94 Feet (FS Corr) 0.00 Feet

1.94 Feet

(GM req) 2.94 Feet

-1.00 Feet

(MH1) 51.89 Ft-tons (TMOM) 565.96 Ft-tons

10.91 Deg

WORKAREA FOR USING DRAFT DIAGRAM:

Tons

VCG Above BL LCG Aft Fwd Perp TCG from CL (+S,-P)

= ( TL * DISPL ) / ( 12 * MT1 )

TRIM

10' 9" 11' 4-5/8" 12' 1-3/8"

Dwg: OS-079-002

I -- Lightship

Baseline draft at LCF Interpolated From Hydrostatics Table Longitudinal center of gravity, aft FP From Loading Summary Longitudinal center of buoyancy, aft FP Interpolated From Hydrostatics Table Trimming lever = LCG - LCB Longitudinal KM Interpolated From Hydrostatics Table Moment to alter trim 1" = ( ( KML - VCG) * DISPL ) / ( 12 * LBP ) Trim (positive is trim aft) Longitudinal center of flotation, aft FP Interpolated From Hydrostatics Table Draft Marks Fwd = Tm + TRIM * ( 10.00 - LCF) / LBP + 0.05 Draft at Plimsoll Mark = Tm + TRIM * ( 97.00 - LCF) / LBP + 0.05 Draft Marks Aft = Tm + TRIM * (196.00 - LCF) / LBP + 0.05

Transverse KM Interpolated From Hydrostatics Table Vertical center of gravity From Loading Summary Metacentric height = KMt - VCG Free surface correction = - FS Mom / DISPL GM Available = GM + FS Corr GM Required Interpolated from Required GM Curves GM Margin = GM Available - GM Required

Moment to alter heel 1° = 0.01745 * GM Available * DISPL

Avg of Observed Drafts Marks Fwd:

Avg of Observed Drafts Marks Aft:

Transverse moment From Loading Summary Heel (positive is to stbd) = TMOM / MH1

Displacement from Diagram:

(Loading Summary) (Hydrostatics Table)

( Hydrostatics Table)

Hydrostatic Properties Interpolation

Calculated Displacement Closest Table Disp., Lower

Closest Table Disp., Higher

Art Anderson Associates, 830 Pacific Avenue, Bremerton WA 98377-1932 (2024-06-13)

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BOOKLET Sheet 26

CONDITION:

WEIGHT FS Mom ITEM % (LT) Lever Moment Lever Moment Lever Moment (Ft-tons )

CREW & EFFECTS 5.20 31.47 163.6 67.51 351 0.00 0.00

CONSTANT STORES

Bosun Stores 4.10 33.00 135.3 -4.29 -18 2.17 8.90 Engineer Stores 4.61 22.71 104.7 91.54 422 8.25 38.03 Stewards Stores 3.09 25.05 77.4 7.51 23 1.43 4.42 Scientific Stores 1.37 16.52 22.6 156.16 214 13.13 17.99

PROVISIONS & STORES 100 16.65 26.37 439.1 18.82 313 5.02 83.58

TANKAGE

Total: Diesel Oil 95 504.19 9.78 4930.1 90.31 45532 0.14 68.30 280.1 Total: Lube Oil 95 6.84 15.48 105.9 121.57 832 0.52 3.54 1.8 Total: Ballast 16 75.87 15.72 1192.7 113.98 8648 -6.17 -468.30 130.8 Total: Anti-Roll Tank 30 34.95 16.27 568.7 149.05 5210 -0.06 -2.10 1860.9 Total: Fresh Water 100 18.38 7.74 142.3 112.00 2059 0.00 0.00 44.9 Total: Miscellaneous Tanks 10 3.21 11.38 36.5 74.21 238 0.25 0.81 60.1

MISSION LOAD 95.99 20.00 1919.8 178.27 17112 -3.35 -321.12

LIGHT SHIP 1529.62 21.34 32642.1 99.39 152029 0.37 565.96

TOTAL DISPLACEMENT 2304.07 18.44 42480.8 101.11 232965 0.00 0.00 2378.7

Disp Tm LCB KML LCF KMt GMreq.

2304.07 15.08 101.11 280.50 111.18 22.22 2.70

2304.07 15.08 101.11 280.50 111.18 22.22 2.70

2340.94 15.25 101.27 278.80 111.35 22.18 2.69

(Tm) 15.08 Feet (LCG) 101.11 Feet (LCB) 101.11 Feet (TL) 0.00 Feet (KML) 280.50 Feet (MT1) 259.37 Ft-tons (TRIM) 0.00 Feet (LCF) 111.18 Feet (DMfwd) (Tx) (DMaft)

(KMt) 22.22 Feet (VCG) 18.44 Feet (GM) 3.78 Feet (FS Corr) -1.03 Feet

2.75 Feet

(GM req) 2.70 Feet

0.05 Feet

(MH1) 110.60 Ft-tons (TMOM) 0.00 Ft-tons

0.00 Deg

WORKAREA FOR USING DRAFT DIAGRAM:

Tons

Dwg: OS-079-002

Interpolated From Hydrostatics Table From Loading Summary Interpolated From Hydrostatics Table

= LCG - LCB

VCG Above BL LCG Aft Fwd Perp TCG from CL (+S,-P)

Hydrostatic Properties Interpolation

Closest Table Disp., Lower (Hydrostatics Table)

Calculated Displacement (Loading Summary)

= 0.01745 * GM Available * DISPL From Loading Summary

= Tm + TRIM * ( 10.00 - LCF) / LBP + 0.05 = Tm + TRIM * ( 97.00 - LCF) / LBP + 0.05 = Tm + TRIM * (196.00 - LCF) / LBP + 0.05

Interpolated From Hydrostatics Table From Loading Summary = KMt - VCG

Free surface correction

= TMOM / MH1

Baseline draft at LCF Longitudinal center of gravity, aft FP Longitudinal center of buoyancy, aft FP Trimming lever Longitudinal KM Moment to alter trim 1" Trim (positive is trim aft) Longitudinal center of flotation, aft FP Draft Marks Fwd

= - FS Mom / DISPL = GM + FS Corr Interpolated from Required GM Curves = GM Available - GM Required

Interpolated From Hydrostatics Table

Avg of Observed Drafts Marks Fwd:

Avg of Observed Drafts Marks Aft:

E -- Extreme Load

Displacement from Diagram:

GM Available GM Required GM Margin

Moment to alter heel 1° Transverse moment Heel (positive is to stbd)

Draft at Plimsoll Mark Draft Marks Aft

Transverse KM Vertical center of gravity Metacentric height

15' 1-1/2"

Closest Table Disp., Higher ( Hydrostatics Table)

TRIM

15' 1-1/2" 15' 1-1/2"

= ( ( KML - VCG) * DISPL ) / ( 12 * LBP )

= ( TL * DISPL ) / ( 12 * MT1 )

Interpolated From Hydrostatics Table

Art Anderson Associates, 830 Pacific Avenue, Bremerton WA 98377-1932 (2024-06-13)

Se e

AB

S

Hou st on , T

X Le tte r r ef W

O

6- G d at ed

2- Ju l-2

BOOKLET Sheet 27

CONDITION:

WEIGHT FS Mom ITEM % (Tons ) Lever Moment Lever Moment Lever Moment (Ft-tons )

Diesel Oil Tanks 95 504.19 9.78 4930.12 90.31 45532.05 0.14 68.30 280.1 DO Storage 4-06-1-F 95 40.84 11.97 488.89 21.98 897.73 5.97 243.83 37.9 DO Storage 4-06-2-F 95 40.84 11.97 488.89 21.98 897.73 -5.97 -243.83 37.9 DO Storage 4-14-1-F 95 76.70 10.61 813.78 37.78 2897.71 9.29 712.54 38.4 DO Storage 4-14-2-F 95 76.70 10.61 813.78 37.78 2897.71 -9.29 -712.54 38.4 DO Storage 4-52-1-F 95 9.56 3.02 28.86 112.00 1070.32 12.40 118.50 5.5 DO Storage 4-52-2-F 95 9.56 3.02 28.86 112.00 1070.32 -12.40 -118.50 5.5 DO Service 4-52-3-F 95 20.92 12.10 253.19 112.00 2343.54 19.28 403.42 2.0 DO Service 4-52-4-F 95 18.85 11.31 213.16 112.00 2110.91 -19.25 -362.81 2.0 DO Storage 4-60-1-F 95 35.43 9.07 321.34 133.47 4728.69 16.74 593.08 2.2 DO Storage 4-60-2-F 95 33.10 8.35 276.34 133.36 4413.56 -16.55 -547.72 2.2 DO Storage 4-72-1-F 95 32.45 8.08 262.23 159.35 5171.68 5.19 168.44 21.2 DO Storage 4-72-2-F 95 40.99 8.15 334.10 156.90 6431.86 -4.54 -186.11 31.8 DO Storage 4-72-3-F 95 34.12 8.89 303.34 155.33 5300.14 14.99 511.49 27.7 DO Storage 4-72-4-F 95 34.12 8.89 303.34 155.33 5300.14 -14.99 -511.49 27.7

Group Minimum Freesurface = 264.53 Lube Oil Tanks 95 6.84 15.48 105.89 121.57 831.54 0.52 3.54 1.80

LO Storage 2-60-1-F 95 3.44 17.00 58.53 123.00 423.47 19.50 67.14 0.8 LO Storage 2-60-2-F 95 2.58 16.25 41.96 123.00 317.60 -19.50 -50.35 0.8 LO Storage 3-54-2-F 95 0.82 6.63 5.40 111.00 90.47 -16.25 -13.24 0.2

Group Minimum Freesurface = 1.60 Ballast Tanks 16 75.87 15.72 1192.71 113.98 8647.73 -6.17 -468.30 130.8

Forepeak 4- B-0-W 100 33.42 15.11 504.90 7.79 260.30 0.00 0.00 35.2 23 S Ballast 4-23-1-W 6.46 58.07 13.14 23 P Ballast 4-23-2-W 6.48 57.79 -13.03 23 C Ballast 4-23-0-W 5.36 57.38 -1.03 60 C Ballast 4-60-0-W 2.58 131.27 -0.08 86 S Ballast 4-86-1-W 14.88 179.44 11.30 86 P Ballast 4-86-2-W 15.18 179.53 -9.86 Aftpeak S 3-94-1-W 16.20 197.55 11.03…