887-B115-01_Weight Estimate Rev(-)_signed.pdf

NSF McMurdo Offload Infrastructure 9 June 2023 Weight Estimate Report 1 Doc. 887-B115-01, Rev -

NSF MCMURDO OFFLOAD INFRASTRUCTURE

Weight Estimate Report

PREPARED FOR:

Moffatt & Nichol

Seattle, WA

BY:

Calder J. Hartigan

NAVAL ARCHITECT

CHECKED:

Andrew L. Girdler, PE

NAVAL ARCHITECT

APPROVED:

Bradley G. Lamkin, PE

PRINCIPAL-IN-CHARGE

DOC. #:

887-B115-01

REV:

FILE:

22105.01

DATE:

9 June 2023

References

1. Glosten, Hydrostatics Report, 887-B125-01.

2. Glosten, GHS Hull Model Report, 887-B105-02.

3. Society of Allied Weight Engineers, Weight Estimating and Margin Manual for Marine

Vehicles, Recommended Practice Number 14, Issue No. -, 22 May 2001.

4. Glosten, 887_Lightship Weight Estimate_Rev(-).xlsx.

5. Glosten, ABS Design Methodology and Parameters, 887-B003-01.

6. Glosten, 887_Loading Conditions_Rev(-).xlsx.

7. Glosten, 887_Hydrostatics_Rev(-).rf.

8. Glosten, 887_LC_Rev(-).rf.

9. Glosten, 887_LC_Rev(-).pf.

10. Hoffman, C.R.; Engineering Manual for McMurdo Station, Civil Engineering Laboratory, Naval Construction Battalion, 1979.

11. Price, D.; Rack, W.; Langhorne, P. J.; Haas, C.; Leonard, G.; Barnsdale, K.; “The sub-ice platelet layer and its influence on freeboard to thickness conversion of Antarctic sea ice,” The

Cryosphere, Copernicus Publications on behalf of the European Geosciences Union, 8, 1031-

1039, 2014.

12. Glosten, Ballast Plan, 887-B660-03.

13. Glosten, 887_RORO_Rev(-).rf.

14. Glosten, 887_ROROStudy_Rev(-).pf.

15. Glosten, 887_ICECUBE_Rev(-).rf.

16. Glosten, 887_ICECUBESTUDY_Rev(-).pf.

Summary

This report summarizes the lightship weight, loading condition deadweights, and static response of the barge-like floating pier to the roll-on/roll-off (RORO) activities expected during unloading operations.

The weights and loading conditions do not exceed the upper ice waterline (UIWL) identified by

Reference 1. Hydrostatic calculations are based on the hull geometry described in Reference 2 with hydrostatic properties as identified by Reference 1.

Weight

Lightship Weight

The estimated lightship weight of the barge-like floating pier is shown in Table 1. This weight estimate uses the weight and VCG margins set forth in Reference 3, consistent with the level of

Weight Estimate Report 2 Doc. 887-B115-01, Rev -design completion. A detailed weight estimate can be found in Appendix A and is also included in Reference 4.

Table 1 Lightship weight summary

Loading Conditions

Five loading conditions were evaluated with the following items included (Reference 5):

• Transit o Tow bridle and emergency tow wire o Skegs o Icing o Allowable deck cargo complement of approximately 900 LT, including:

▪ Fendering equipment, including rubber cone fenders and fender pads

▪ Shore bridges, mooring struts, and load cells

▪ Additional deck cargo up to 600 LT

• Summer (Resupply) Season o Fenders o Installed shore bridges, mooring struts, and load cells o Icing, assumed 50% icing load due to clearing vehicle deck o Permanent ballast installed at McMurdo Station o Allowable deck cargo complement of approximately 700 LT, including:

▪ Two trucks (80,000-lb gross vehicle weight, including cargo), material handling equipment (MHE).

▪ Cargo handling equipment and storage

▪ Up to 580 LT additional cargo on deck, including unloaded cargo awaiting transfer to trucks or portable equipment

• Winter Season o Rubber cone of fenders

▪ Does not include fendering pads (removed for winter) o Icing o Snow

Weight Estimate Report 3 Doc. 887-B115-01, Rev -o Shore bridges, mooring struts, and load cells o Permanent ballast installed at McMurdo Station

• Light Installed o Fenders o Shore bridges, mooring struts, and load cells o Permanent ballast installed at McMurdo Station

• Post-Delivery Transit o Tow bridle and emergency tow wire o Skegs o Icing o Permanent ballast installed at McMurdo Station o Ballast carried on deck to balance installed permanent ballast

The Light Installed loading condition is intended to be representative of the expected minimum draft experienced in ice. However, the lower ice waterline (LIWL) draft of 6’-4” for determining

Polar Class structure zones as described in Reference 5 is assumed to be the minimum draft experienced in the lightship condition for conservatism and to increase the allowable trim envelope in the light installed loading condition.

The design loading condition deadweights and centers are reported in Table 2. Overall loading condition displacements, and hydrostatics are reported in Table 3. Further detail in the loading condition weight estimates is included in Appendix B and Reference 6. Additional hydrostatic properties for each loading condition as produced by the General Hydrostatics (GHS) run files in

References 7 and 8 can be found in Appendix B and Reference 9. No loading condition exceeds the 8-ft upper ice waterline (UIWL) requirement, including the effects of trim and heel.

Table 2 Design Loading Condition Deadweight Summary

Table 3 Design Loading Condition

Loading Condition

Displacement

(LT)

LCG

ft +aft FP

TCG

ft +stbd

VCG

ft +ABL

LCF Draft ft

Trim °+aft

Heel °+stbd

Transit 4,057.0 164.0 0.000 13.59 7.99 0.00 0.00

Summer 4,060.8 164.0 0.000 13.51 8.00 0.00 0.00

Winter 3,589.3 164.0 0.351 11.94 7.28 0.00 0.23

Light installed 3,308.0 164.0 0.000 11.40 6.85 0.00 0.00

Post-delivery 3,414.9 164.0 0.000 11.57 7.02 0.00 0.00

Weight Estimate Report 4 Doc. 887-B115-01, Rev -

Environmental Load Calculations

Icing loads were determined in accordance with IMO Polar Code Chapter 4.3.1.1, and are located on decks and exposed side shell plating. The snow weight was calculated using the typical 6-to-8-inch snow cover on the sea ice sheet covering the McMurdo embayment

(Reference 10). The snow density was assumed to be equal to the average snow density of 385 kg/m3 as reported by Reference 11 across 18 different locations on the sea ice in McMurdo sound. This value is within the range of typical densities reported by Reference 10 for dry old snow. Drifting snow that accumulates in sheltered areas is typical at McMurdo station.

Therefore, the snow cover on the sea ice sheet is expected to be more representative of the exposed barge deck than total yearly precipitation. The bull rail and other deck fittings will increase the amount snow drifting on deck, but these fittings have relatively low prominence and are not expected to have a significant impact on this assumption.

Ballast Calculations

Asymmetries in the barge design, most notably the off-center weight of the shore bridges and mooring struts, will cause the barge to trim and heel without permanent ballast. The required amount of permanent ballast to be installed at McMurdo Station was calculated to make the barge pier have zero static heel and trim during the summer resupply season, minimizing the maximum deck slope experienced during dynamic unloading operations and maximizing the allowable deadweight before exceeding UIWL draft. Ballast calculations for installation at

McMurdo station were based on fixed ballast with a specific gravity of 4.8.

The amount of ballast required to make the barge pier have zero heel and trim during any return voyages for drydocking and inspection was also calculated. The total permanent and temporary ballast weight that would be used for a return voyage is less than the deck cargo allowance of approximately 900 LT in the transit loading condition, so a return voyage is not a limiting loading condition.

The ballast plan drawing (Reference 12) describes ballast including permanent fixed ballast and temporary deck ballast. The geometry and structure of the bins to contain the permanent ballast is identified.

Roll-on, Roll-off Study

The envelope of the heel angles and bridge deflections that would be produced by the moving trucks on the pier barge was determined by adding either one or two fully loaded trucks (80,000 lb each) to the light operating loading condition at the following locations:

• On centerline, representing the average heel during operations.

• On shore/starboard side, representing the heel as trucks move between the bridge and the barge.

• On pier/port side, representing the maximum heel while loading cargo on the truck.

The bridge connection and truck locations were taken at the extreme beam for conservatism to determine the envelope for heel angles during unloading operations. The trucks were placed amidships to consider heel only. Table 4 summarizes the results of the weight shifts for these different configurations, calculated using the General HydroStatics run file included in Reference

13. Additional detail is included in Reference 14. The maximum deck slope expected during loading operations approximately 1.3% to port or starboard.

Weight Estimate Report 5 Doc. 887-B115-01, Rev -

Table 4 Roll-on, roll-off study

Case Heel (° +stbd/shore) Fwd/Aft Bridge Deflection (ft)

Light operating baseline 0 0

Add 1 truck stbd 0.36 -0.37

Add 1 truck CL 0 -0.05

Add 1 truck port -0.36 0.27

Add 2 trucks stbd 0.74 -0.75

Add 2 trucks CL 0 -0.11

Add 2 trucks port -0.74 0.55

Ice Cube Study

The change in the barge draft, trim, and heel resulting from ice flowing beneath the bottom of the barge in the winter condition were calculated to determine the resulting bridge deflection at the deck edge. An ice density of 57.2 lb/ft3 was used to assess bridge deflections for the following cases:

1. A 328’x100’x8’ ice block centered 164’ aft of FP and on centerline

2. A 164’x100’x8’ ice block centered 82’ aft of FP and on centerline

3. A 164’x50’x8’ ice block centered 82’ aft of FP and on centerline

4. A 328’x50’x8’ ice block centered 164’ aft of FP, 25’ to port

5. A 328’x50’x8’ ice block centered 164’ aft of FP, 25’ to stbd

6. A 164’x50’x8’ ice block centered 82’ aft of FP, 25’ to port

7. A 164’x50’x8’ ice block centered 82’ aft of FP, 25’ to stbd

Table 5 shows the resulting trims, heels, and bridge deflections due to ice underneath the barge, calculated using the General HydroStatics run file included in Reference 15. Further detail is included in Reference 16.

Table 5 Deflections due to submerged ice

Case Trim °+fwd

Heel °+stbd/shore

Fwd Bridge Deflection (ft)

Aft Bridge Deflection (ft)

Light operating baseline

0 0 0 0

1 0 0 1.32 1.32

2 -0.4 0 1.41 -0.07

3 -0.2 0 0.68 -0.03

4 0 2.5 -1.43 -1.4

5 0 -2.5 2.84 2.87

6 -0.2 1.1 -0.29 -0.99

7 -0.2 -1.1 1.68 0.98

Weight Estimate Report A-1 Doc. 887-B115-01, Rev -

Appendix A Weight Estimate

WEIGHT ESTIMATE - SUMMARY 6/9/2023

MDC Group Description Margin Weight Margin LCG TCG VCG Notes No. % LT LT ft +Aft Fr 0 ft +Stbd CL ft +Abv BL

100 Scientific (none) 0.00 0.00 0.00 0.00 0.00 200 Arrangements (none) 0.00 0.00 0.00 0.00 0.00 300 Structural* 6.00% 2,709.44 162.57 163.64 0.06 10.10 Includes Allowances 400 Outfit and Furnishings 8.00% 97.82 7.83 164.05 -3.46 16.46 Includes Allowances 500 Special Features 6.00% 0.00 0.00 0.00 0.00 0.00 600 Machinery 6.00% 0.00 0.00 0.00 0.00 0.00 700 Electrical 6.00% 0.00 0.00 0.00 0.00 0.00 800 Spare Parts 6.00% 0.00 0.00 0.00 0.00 0.00

Lightship (Without Margins) 2,807.26 163.65 -0.07 10.32

Design and Build Weight Margin 6.07% 170.39 163.66 -0.10 10.39 Contract Mods. Weight Margin 1.45% 40.71 163.65 -0.07 10.32

Design and Build VCG Margin 6.00% 0.62 Contract Mods. VCG Margin 1.25% 0.13

Lightship (With Margins) 3,018.36 163.66 -0.07 11.08

*Includes allowances for welding (1.5%); brackets, inserts and doublers (2%); and mill tolerances (2%).

NSF McMurdo Offload Infrastructure Weight Estimate Report A-2

9 June 2023 Doc. 887-B115-01, Rev -

DETAILED WEIGHTS (WITHOUT MARGINS OR ALLOWANCES)

1-Digit MDC number and item Sum of Weight [LT] LCG [ft + Aft FP] TCG [ft + Stbd/shore] VCG [+ ft ABL]

307 1237.4 163.5 0.0 10.0

Side Shell 579.1 162.9 0.0 7.5 Deck 444.7 164.0 0.0 18.0 Bottom Shell 213.6 164.0 0.0 0.0

309 658.1 163.7 -0.1 10.1

Transverse NT Bhd 59.9 177.1 0.0 11.8 Collision Bhd 10.3 157.1 0.5 8.2 Transverse WT Bhd 100.9 156.1 0.0 9.3 Deck Girder 100.1 164.0 0.0 16.8 Bottom Transverse 27.5 164.0 0.0 1.1 Insert Plt Header 7.1 174.0 0.0 9.5 Deck Frames 0.4 164.0 0.0 17.8 Side Oblique 13.5 164.0 0.0 8.1 Vert Stiffs (wing outbd) 10.7 164.0 -0.1 12.9 Side Transverse 6.5 164.0 0.0 11.0 Vert Stiffs (wing mid) 1.4 164.0 0.0 11.6 Vert Stiffs (mid) 22.9 160.5 0.0 9.7 Vertical Web IWO Ice Stringer 9.0 164.0 0.0 12.6 Side Longl 6.4 164.0 0.0 5.5 Side Transv 175.7 163.0 -0.3 7.0 Ice Stringer Bracket 0.9 164.0 0.0 10.5 Access Hole Reinforcement 2.5 164.0 0.0 10.3 Side Frame 24.3 163.7 -0.1 15.9 Transv Ice Belt Stringer 59.1 164.0 0.0 8.9 Corner 3.2 164.0 0.0 17.2 Vert Stiffs (wing inbd) 3.5 186.2 0.0 11.8 Access Hole Headers 0.0 307.8 0.0 11.6 Vert Stiff IWO Longl Girder 2.5 164.0 0.0 9.7 Vert Stiffs (wing) 3.0 164.1 -0.3 12.3 Vert Stiff IWO Longl Girders 1.9 164.3 0.0 9.7 Solid Floor 0.8 164.0 0.0 4.0 Bhd Header Bkt 0.2 167.9 0.6 15.4 Bkt IWO Ice Fr 3.7 164.0 0.0 10.8 FR1/61 Stanchion 0.2 164.0 0.0 15.6

311 623.7 164.0 0.0 10.0

Longitudinal Ice Belt Stringer 135.7 164.0 0.0 8.3 Bottom Shell Girder 34.4 164.0 0.0 2.5 Deck Girder 44.5 164.0 0.0 16.0 Longitudinal NT Bhd 95.5 163.8 0.0 9.2 Typical Stanchion 6.9 164.0 0.0 9.7 Transverse Fore/Aft Diaphragm 3.2 164.0 0.0 14.1 Longl Fore/Aft Diaphragm 28.0 164.0 0.0 10.7 Insert Plt Header 2.0 164.0 0.0 9.0 Deck Frames 119.5 164.0 0.0 17.7 Vert Stiffs (mid) 9.9 164.1 0.0 9.5 Vert Stiffs 9.9 164.0 0.0 12.4 Rake Transv 40.8 164.0 0.0 7.7 Rake Oblique 8.3 164.0 0.0 8.0 Rake Longl 0.7 164.0 0.0 7.1

NSF McMurdo Offload Infrastructure Weight Estimate Report A-3

BiB Frames 5.3 164.0 0.0 0.3 Bottom Frames 57.0 164.0 0.0 0.3 Topsides Frame (Rake) 6.5 164.0 0.0 15.3 Vert Stiffs at Transv 13.2 164.0 0.0 9.2 Fore/Aft Stanchion 1.3 164.0 0.0 9.8 Longl NT Diaphragm Header 0.2 164.0 0.0 10.6 Bracket at Longl Girder 1.0 164.0 0.0 9.8

330 24.0 160.8 -7.5 18.2

General foundation allowance 6.3 164.0 0.0 18.0 Mooring Foundations 12.2 164.0 -22.0 19.4 Ocean Towing 0.5 7.7 0.0 18.0 Fender Foundation 1.6 164.0 -50.0 15.2 Padeye Brg 0.8 164.0 50.8 15.9 Strut Padeye 2.6 164.0 49.9 15.9

405 11.7 164.0 0.0 0.0

Zinc anodes 11.7 164.0 0.0 0.0 406 38.3 164.0 0.0 18.9

Hull painting 38.3 164.0 0.0 18.9 415 1.4 153.0 -11.4 18.0

Compartment access from deck 1.4 153.0 -11.4 18.0 420 32.0 165.0 -9.7 18.9

Ocean Towing 0.7 100.1 3.9 19.4 WQB Ship-Barge Mooring 12.5 158.9 -21.4 19.4 Bull Rail 18.7 171.5 -2.7 18.5 Traffic Bollards 0.1 164.0 47.8 19.5

427 1.1 153.0 -11.4 14.0

Ladders to compartments 1.1 153.0 -11.4 14.0 430 13.3 164.0 0.0 18.0

Deck Coating System 13.3 164.0 0.0 18.0 450 0.1 164.0 0.0 18.0

Removable ladder 0.1 164.0 0.0 18.0 320 10.6 164.0 -32.4 10.8

Coaming 0.6 164.0 -32.7 14.2 Side Stiffs 1.1 164.0 -32.7 11.8 Bottom Stiffs 1.9 164.0 -32.7 9.6 Vert Panel Stiffs 0.2 164.0 -29.2 7.8 Ballast Tank Plating 6.8 164.0 -32.3 10.8

398 13.3 164.0 53.0 14.6

Corbels 13.3 164.0 53.0 14.6

NSF McMurdo Offload Infrastructure Weight Estimate Report A-4

Weight Estimate Report B-1 Doc. 887-B115-01, Rev -

Appendix B Loading Conditions

Design Loading Conditions - Summary 6/9/2023 LC Group Description Weight LCG TCG VCG Notes

LT ft +Aft Fr 0 ft +Stbd CL ft +Abv BL

LS Lightship (from weight estimate) 3,018.4 163.7 -0.1 11.1 With margins

UIWL Upper Ice Waterline displacement 4,064.5 8 ft draft, even keel Allowable deadweight to meet UIWL draft 1,046.1

Design Loading Condition Deadweights

T Transit delivery deadweight 1,038.6 165.0 0.2 20.9 Meets allowable UIWL deadweight S Summer deadweight 1,042.4 165.0 0.2 20.5 Meets allowable UIWL deadweight W Winter deadweight 571.0 165.8 2.6 16.5 Meets allowable UIWL deadweight L Light installed deadweight 289.6 167.6 0.7 14.8 Meets allowable UIWL deadweight P Post-delivery transit deadweight 396.5 166.6 0.5 15.3 Meets allowable UIWL deadweight

NSF McMurdo Offload Infrastructure Weight Estimate Report B-2

TRANSIT DELIVERY LOADING CONDITION WEIGHTS

Loading condition summary table includes items that may be included as part of deck cargo allowable deadweight.

MDC Number, Item Sum of Weight [LT] LCG [ft +aft FP] TCG [ft +Stbd/shore] VCG [ft +ABL]

Transit LC 140.6 186.4 0.0 16.2

420 12.6 159.0 0.0 18.0

Tow bridle (transit) 6.3 0.0 0.0 18.0 Emergency tow wire 6.3 318.0 0.0 18.0

498 26.4 285.8 0.0 9.0

Skeg 26.4 285.8 0.0 9.0

ENV 101.6 164.0 0.0 17.8

Accumulated Ice (Winter, Transit) 101.6 164.0 0.0 17.8 Possible Deck Cargo 898.0 161.7 0.2 21.6

412 67.9 164.0 0.0 21.0

Strut & load cells (in transit) 67.9 164.0 0.0 21.0 420 31.6 164.0 0.0 16.7

Fendering 6.4 164.0 0.0 18.0 Fender pads 25.2 164.0 0.0 16.4

498 178.6 164.0 0.0 18.0

Bridges as deck cargo 178.6 164.0 0.0 18.0

CARGO 620.0 160.6 0.3 23.0

Additional deck cargo allowance 620.0 160.6 0.3 23.0 Grand Total 1038.6 165.0 0.2 20.9

NSF McMurdo Offload Infrastructure Weight Estimate Report B-3

SUMMER LOADING CONDITION WEIGHTS

MDC Number, Item Sum of Weight [LT] LCG [ft +aft FP] TCG [ft +Stbd/shore] VCG [ft +ABL]

412 33.9 164.0 50.8 16.0

Installed strut & load cell 33.9 164.0 50.8 16.0 420 31.6 164.0 -50.0 16.4

Fendering 6.4 164.0 -50.0 16.4 Fender pads 25.2 164.0 -50.0 16.4

498 89.3 164.0 50.0 18.0

Bridges - deployed 89.3 164.0 50.0 18.0 660 134.6 171.8 -32.7 12.0

Permanent Ballast Bin 1 12.4 140.0 -32.7 12.0 Permanent Ballast Bin 2 25.4 156.0 -32.7 12.0 Permanent Ballast Bin 3 48.4 172.0 -32.7 12.0 Permanent Ballast Bin 4 48.4 188.0 -32.7 12.0

ENV 50.8 164.0 0.0 17.8

Accumulated Ice (Summer) 50.8 164.0 0.0 17.8

CARGO 702.0 164.0 0.0 23.1

Loader 29.9 164.0 0.0 24.5 Cargo handling 20.8 164.0 0.0 19.8 Cargo on deck allowance 580.0 164.0 0.0 23.0 Loaded trucks 71.4 164.0 0.0 24.5

Grand Total 1042.3 165.0 0.2 20.5

NSF McMurdo Offload Infrastructure Weight Estimate Report B-4

WINTER LOADING CONDITION WEIGHTS

412 33.9 164.0 50.8 16.0

Installed strut & load cell 33.9 164.0 50.8 16.0 420 6.4 164.0 -50.0 16.4

Fendering 6.4 164.0 -50.0 16.4 498 89.3 164.0 50.0 18.0

Bridges - deployed 89.3 164.0 50.0 18.0 660 134.6 171.8 -32.7 12.0

Permanent Ballast Bin 1 12.4 140.0 -32.7 12.0 Permanent Ballast Bin 2 25.4 156.0 -32.7 12.0 Permanent Ballast Bin 3 48.4 172.0 -32.7 12.0 Permanent Ballast Bin 4 48.4 188.0 -32.7 12.0

ENV 306.6 164.0 0.0 18.1

Accumulated Snow (Winter) 205.0 164.0 0.0 18.3 Accumulated Ice (Winter, Transit) 101.6 164.0 0.0 17.8

Grand Total 570.8 165.8 2.6 16.5

NSF McMurdo Offload Infrastructure Weight Estimate Report B-5

LIGHT INSTALLED LOADING CONDITION WEIGHTS

412 33.9 164.0 50.8 16.0

Installed strut & load cell 33.9 164.0 50.8 16.0 420 31.6 164.0 -50.0 16.4

Fender pads 25.2 164.0 -50.0 16.4 Fendering 6.4 164.0 -50.0 16.4

498 89.3 164.0 50.0 18.0

Bridges - deployed 89.3 164.0 50.0 18.0 660 134.6 171.8 -32.7 12.0

Permanent Ballast Bin 1 12.4 140.0 -32.7 12.0 Permanent Ballast Bin 2 25.4 156.0 -32.7 12.0 Permanent Ballast Bin 3 48.4 172.0 -32.7 12.0 Permanent Ballast Bin 4 48.4 188.0 -32.7 12.0

Grand Total 289.5 167.6 0.7 14.8

NSF McMurdo Offload Infrastructure Weight Estimate Report B-6

POST-DELIVERY TRANSIT LOADING CONDITION WEIGHTS

420 12.6 159.0 0.0 18.0

Tow bridle (transit) 6.3 0.0 0.0 18.0 Emergency tow wire 6.3 318.0 0.0 18.0

498 26.4 285.8 0.0 9.0

Skeg 26.4 285.8 0.0 9.0 660 255.8 155.8 0.8 14.8

Return fixed ballast 121.2 138.0 38.0 18.0 Permanent Ballast Bin 1 12.4 140.0 -32.7 12.0 Permanent Ballast Bin 2 25.4 156.0 -32.7 12.0 Permanent Ballast Bin 3 48.4 172.0 -32.7 12.0 Permanent Ballast Bin 4 48.4 188.0 -32.7 12.0

ENV 101.6 164.0 0.0 17.8

Accumulated Ice (Winter, Transit) 101.6 164.0 0.0 17.8 Grand Total 396.4 166.6 0.5 15.3

NSF McMurdo Offload Infrastructure Weight Estimate Report B-7

06/09/23 13:19:06 Glosten

GHS 18.50 LOADING CONDITION SUMMARY

LIGHTSHIP LOADING CONDITION

WEIGHT STATUS

Trim: Fwd 0.01 deg., Heel: Port 0.04 deg.

Part------------------------------Weight(LT)----LCG-----TCG-----VCG-------FSM WEIGHT 3,018.36 163.65a 0.07p 11.08

Load-----SpGr-----Weight(LT)----LCG-----TCG-----VCG Total Tanks---------> 0.00 0.0

Distances in FEET.-------------------------------------------Moments in Ft-LT.

HYDROSTATIC PROPERTIES

Trim: Fwd 0.01 deg., Heel: Port 0.04 deg., VCG = 11.08

LCF Displacement Buoyancy-Ctr. Weight/ Moment/ Draft----Weight(LT)----LCB-----VCB-----Inch-----LCF--Deg trim----GML-----GMT

6.378 3,018.35 163.65a 3.46 50.30 163.24a 73182 1389.0 80.25

Distances in FEET.-------Specific Gravity = 1.025.-----------Moment in Ft-LT.

Draft is from Baseline.

Note: GMT includes the formal free surface moment 0.0 Ft-LT

HYDROSTATIC PROPERTIES

Trim: Fwd 0.01 deg., Heel: Port 0.04 deg.

Origin Displacement Center of Buoyancy Depth----Weight(LT)----LCB-----TCB-----VCB-----WPA-----LCF------BML-----BMT

6.420 3,018.35 163.65a 0.07p 3.46 21129 163.24a 1396.7 87.87

Distances in FEET.-------Specific Gravity = 1.025.--------------------------

Note: BMT includes the formal free surface moment 0.0 Ft-LT

CRITICAL POINT STATUS

Baseline draft: 6.420 @ Origin

Trim: Fwd 0.01 deg., Heel: Port 0.04 deg.

Critical Points----------------------LCP-----TCP-----VCP-----Height

(1) FWD PORT UIWL FLOOD 0.00 50.00p 0.00 -6.45

(2) FWD STBD UIWL FLOOD 0.00 50.00s 0.00 -6.39

(3) AFT PORT UIWL FLOOD 328.00a 50.00p 0.00 -6.37

(4) AFT STBD UIWL FLOOD 328.00a 50.00s 0.00 -6.30 Distances in FEET.----------------------------------------------------

NSF McMurdo Offload Infrastructure Weight Estimate Report

B-8 9 June 2023

LIGHTSHIP LOADING CONDITION

CG - Draft: 6.42 @ 0.00 Trim: fwd 0.01 deg. Heel: port 0.04 deg.

Outboard Profile View

Body @ 164.00a

Critical Points cp1 FWD PORT UIWL cp2 FWD STBD UIWL cp3 AFT PORT UIWL cp4 AFT STBD UIWL

NSF McMurdo Offload Infrastructure Weight Estimate Report

B-9 9 June 2023

TRANSIT LOADING CONDITION

WEIGHT STATUS

Trim: 0.00 deg., Heel: zero

Part------------------------------Weight(LT)----LCG-----TCG-----VCG-------FSM LIGHT SHIP 3,018.36 163.65a 0.07p 11.08 Transit delivery deadweig 1,038.64 165.00a 0.20s 20.89

Total Weight--------> 4,057.00 164.00a 0.00 13.59 Load-----SpGr-----Weight(LT)----LCG-----TCG-----VCG

Total Tanks---------> 0.00 0.0 Distances in FEET.-------------------------------------------Moments in Ft-LT.

HYDROSTATIC PROPERTIES

Trim: 0.00 deg., No Heel, VCG = 13.59

LCF Displacement Buoyancy-Ctr. Weight/ Moment/ Draft----Weight(LT)----LCB-----VCB-----Inch-----LCF--Deg trim----GML-----GMT

7.989 4,056.99 164.00a 4.42 56.90 163.90a 88596 1251.1 78.97

Distances in FEET.-------Specific Gravity = 1.025.-----------Moment in Ft-LT.

Draft is from Baseline.

Note: GMT includes the formal free surface moment 0.0 Ft-LT

HYDROSTATIC PROPERTIES

Trim: 0.00 deg., No Heel

Origin Displacement Center of Buoyancy Depth----Weight(LT)----LCB-----TCB-----VCB-----WPA-----LCF------BML-----BMT

7.988 4,056.99 164.00a 0.00 4.42 23904 163.90a 1260.3 88.15

Distances in FEET.-------Specific Gravity = 1.025.--------------------------

Note: BMT includes the formal free surface moment 0.0 Ft-LT

CRITICAL POINT STATUS

Baseline draft: 7.988 @ Origin Trim: 0.00 deg., Heel: zero

Critical Points----------------------LCP-----TCP-----VCP-----Height

(1) FWD PORT UIWL FLOOD 0.00 50.00p 0.00 -7.99

(2) FWD STBD UIWL FLOOD 0.00 50.00s 0.00 -7.99

(3) AFT PORT UIWL FLOOD 328.00a 50.00p 0.00 -7.99

(4) AFT STBD UIWL FLOOD 328.00a 50.00s 0.00 -7.99 Distances in FEET.----------------------------------------------------

NSF McMurdo Offload Infrastructure Weight Estimate Report

B-10 9 June 2023

TRANSIT LOADING CONDITION

Condition Graphic - Draft: 7.99 @ 0.00 Trim: 0.00 deg. Heel: zero

Outboard Profile View

Body @ 164.00a

Critical Points cp1 FWD PORT UIWL cp2 FWD STBD UIWL cp3 AFT PORT UIWL cp4 AFT STBD UIWL

NSF McMurdo Offload Infrastructure Weight Estimate Report

B-11 9 June 2023

SUMMER LOADING CONDITION

WEIGHT STATUS

Trim: 0.00 deg., Heel: zero

Part------------------------------Weight(LT)----LCG-----TCG-----VCG-------FSM LIGHT SHIP 3,018.36 163.65a 0.07p 11.08 Summer deadweight 1,042.42 165.00a 0.20s 20.55

Total Weight--------> 4,060.78 164.00a 0.00 13.51 Load-----SpGr-----Weight(LT)----LCG-----TCG-----VCG

Total Tanks---------> 0.00 0.0 Distances in FEET.-------------------------------------------Moments in Ft-LT.

HYDROSTATIC PROPERTIES

Trim: 0.00 deg., No Heel, VCG = 13.51

LCF Displacement Buoyancy-Ctr. Weight/ Moment/ Draft----Weight(LT)----LCB-----VCB-----Inch-----LCF--Deg trim----GML-----GMT

7.995 4,060.72 163.99a 4.42 56.93 163.90a 88655 1250.8 79.06

Distances in FEET.-------Specific Gravity = 1.025.-----------Moment in Ft-LT.

Draft is from Baseline.

Note: GMT includes the formal free surface moment 0.0 Ft-LT

HYDROSTATIC PROPERTIES

Trim: 0.00 deg., No Heel

Origin Displacement Center of Buoyancy Depth----Weight(LT)----LCB-----TCB-----VCB-----WPA-----LCF------BML-----BMT

7.994 4,060.72 163.99a 0.00 4.42 23913 163.90a 1259.9 88.15

Distances in FEET.-------Specific Gravity = 1.025.--------------------------

Note: BMT includes the formal free surface moment 0.0 Ft-LT

CRITICAL POINT STATUS

Baseline draft: 7.994 @ Origin Trim: 0.00 deg., Heel: zero

Critical Points----------------------LCP-----TCP-----VCP-----Height

(1) FWD PORT UIWL FLOOD 0.00 50.00p 0.00 -7.99

(2) FWD STBD UIWL FLOOD 0.00 50.00s 0.00 -7.99

(3) AFT PORT UIWL FLOOD 328.00a 50.00p 0.00 -7.99

(4) AFT STBD UIWL FLOOD 328.00a 50.00s 0.00 -7.99 Distances in FEET.----------------------------------------------------

NSF McMurdo Offload Infrastructure Weight Estimate Report

B-12 9 June 2023

SUMMER LOADING CONDITION

Condition Graphic - Draft: 7.99 @ 0.00 Trim: 0.00 deg. Heel: zero

Outboard Profile View

Body @ 164.00a

Critical Points cp1 FWD PORT UIWL cp2 FWD STBD UIWL cp3 AFT PORT UIWL cp4 AFT STBD UIWL

NSF McMurdo Offload Infrastructure Weight Estimate Report

B-13 9 June 2023

WINTER LOADING CONDITION

WEIGHT STATUS

Trim: 0.00 deg., Heel: Stbd 0.23 deg.

Part------------------------------Weight(LT)----LCG-----TCG-----VCG-------FSM LIGHT SHIP 3,018.36 163.65a 0.07p 11.08 Winter deadweight 570.98 165.82a 2.57s 16.51

Total Weight--------> 3,589.33 164.00a 0.35s 11.94 Load-----SpGr-----Weight(LT)----LCG-----TCG-----VCG

Total Tanks---------> 0.00 0.0 Distances in FEET.-------------------------------------------Moments in Ft-LT.

HYDROSTATIC PROPERTIES

Trim: 0.00 deg., Heel: Stbd 0.23 deg., VCG = 11.94

LCF Displacement Buoyancy-Ctr. Weight/ Moment/ Draft----Weight(LT)----LCB-----VCB-----Inch-----LCF--Deg trim----GML-----GMT

7.283 3,589.14 164.00a 3.99 53.08 162.85a 77614 1238.9 78.71

Distances in FEET.-------Specific Gravity = 1.025.-----------Moment in Ft-LT.

Draft is from Baseline.

Note: GMT includes the formal free surface moment 0.0 Ft-LT

HYDROSTATIC PROPERTIES

Trim: 0.00 deg., Heel: Stbd 0.23 deg.

Origin Displacement Center of Buoyancy Depth----Weight(LT)----LCB-----TCB-----VCB-----WPA-----LCF------BML-----BMT

7.287 3,589.14 164.00a 0.38s 3.99 22296 162.85a 1246.8 86.65

Distances in FEET.-------Specific Gravity = 1.025.--------------------------

Note: BMT includes the formal free surface moment 0.0 Ft-LT

CRITICAL POINT STATUS

Baseline draft: 7.287 @ Origin

Trim: 0.00 deg., Heel: Stbd 0.23 deg.

Critical Points----------------------LCP-----TCP-----VCP-----Height

(1) FWD PORT UIWL FLOOD 0.00 50.00p 0.00 -7.09

(2) FWD STBD UIWL FLOOD 0.00 50.00s 0.00 -7.48

(3) AFT PORT UIWL FLOOD 328.00a 50.00p 0.00 -7.08

(4) AFT STBD UIWL FLOOD 328.00a 50.00s 0.00 -7.48 Distances in FEET.----------------------------------------------------

NSF McMurdo Offload Infrastructure Weight Estimate Report

B-14 9 June 2023

WINTER LOADING CONDITION

CG - Draft: 7.29 @ 0.00 Trim: 0.00 deg. Heel: stbd 0.23 deg.

1 234

Outboard Profile View

Body @ 164.00a

Critical Points cp1 FWD PORT UIWL cp2 FWD STBD UIWL cp3 AFT PORT UIWL cp4 AFT STBD UIWL

NSF McMurdo Offload Infrastructure Weight Estimate Report

B-15 9 June 2023

LIGHT INSTALLED LOADING CONDITION

WEIGHT STATUS

Trim: 0.00 deg., Heel: zero

Part------------------------------Weight(LT)----LCG-----TCG-----VCG-------FSM LIGHT SHIP 3,018.36 163.65a 0.07p 11.08 Light installed deadweigh 289.60 167.59a 0.71s 14.80

Total Weight--------> 3,307.95 164.00a 0.00 11.40 Load-----SpGr-----Weight(LT)----LCG-----TCG-----VCG

Total Tanks---------> 0.00 0.0 Distances in FEET.-------------------------------------------Moments in Ft-LT.

HYDROSTATIC PROPERTIES

Trim: 0.00 deg., No Heel, VCG = 11.40

LCF Displacement Buoyancy-Ctr. Weight/ Moment/ Draft----Weight(LT)----LCB-----VCB-----Inch-----LCF--Deg trim----GML-----GMT

6.846 3,307.94 164.00a 3.73 52.58 164.21a 79228 1372.1 81.02

Distances in FEET.-------Specific Gravity = 1.025.-----------Moment in Ft-LT.

Draft is from Baseline.

Note: GMT includes the formal free surface moment 0.0 Ft-LT

HYDROSTATIC PROPERTIES

Trim: 0.00 deg., No Heel

Origin Displacement Center of Buoyancy Depth----Weight(LT)----LCB-----TCB-----VCB-----WPA-----LCF------BML-----BMT

6.848 3,307.94 164.00a 0.00 3.73 22087 164.21a 1379.8 88.68

Distances in FEET.-------Specific Gravity = 1.025.--------------------------

Note: BMT includes the formal free surface moment 0.0 Ft-LT

CRITICAL POINT STATUS

Baseline draft: 6.848 @ Origin Trim: 0.00 deg., Heel: zero

Critical Points----------------------LCP-----TCP-----VCP-----Height

(1) FWD PORT UIWL FLOOD 0.00 50.00p 0.00 -6.85

(2) FWD STBD UIWL FLOOD 0.00 50.00s 0.00 -6.85

(3) AFT PORT UIWL FLOOD 328.00a 50.00p 0.00 -6.84

(4) AFT STBD UIWL FLOOD 328.00a 50.00s 0.00 -6.84 Distances in FEET.----------------------------------------------------

NSF McMurdo Offload Infrastructure Weight Estimate Report

B-16 9 June 2023

LIGHT INSTALLED LOADING CONDITION

Condition Graphic - Draft: 6.85 @ 0.00 Trim: 0.00 deg. Heel: zero

Outboard Profile View

Body @ 164.00a

Critical Points cp1 FWD PORT UIWL cp2 FWD STBD UIWL cp3 AFT PORT UIWL cp4 AFT STBD UIWL

NSF McMurdo Offload Infrastructure Weight Estimate Report

B-17 9 June 2023

POSTDELIVERY LOADING CONDITION

WEIGHT STATUS

Trim: 0.00 deg., Heel: zero

Part------------------------------Weight(LT)----LCG-----TCG-----VCG-------FSM LIGHT SHIP 3,018.36 163.65a 0.07p 11.08 Post-delivery transit dwt 396.55 166.63a 0.52s 15.31

Total Weight--------> 3,414.90 164.00a 0.00 11.57 Load-----SpGr-----Weight(LT)----LCG-----TCG-----VCG

Total Tanks---------> 0.00 0.0 Distances in FEET.-------------------------------------------Moments in Ft-LT.

HYDROSTATIC PROPERTIES

Trim: 0.00 deg., No Heel, VCG = 11.57

LCF Displacement Buoyancy-Ctr. Weight/ Moment/ Draft----Weight(LT)----LCB-----VCB-----Inch-----LCF--Deg trim----GML-----GMT

7.015 3,414.86 164.00a 3.83 53.25 164.21a 80769 1355.0 80.96

Distances in FEET.-------Specific Gravity = 1.025.-----------Moment in Ft-LT.

Draft is from Baseline.

Note: GMT includes the formal free surface moment 0.0 Ft-LT

HYDROSTATIC PROPERTIES

Trim: 0.00 deg., No Heel

Origin Displacement Center of Buoyancy Depth----Weight(LT)----LCB-----TCB-----VCB-----WPA-----LCF------BML-----BMT

7.017 3,414.86 164.00a 0.00 3.83 22370 164.21a 1362.8 88.70

Distances in FEET.-------Specific Gravity = 1.025.--------------------------

Note: BMT includes the formal free surface moment 0.0 Ft-LT

CRITICAL POINT STATUS

Baseline draft: 7.017 @ Origin Trim: 0.00 deg., Heel: zero

Critical Points----------------------LCP-----TCP-----VCP-----Height

(1) FWD PORT UIWL FLOOD 0.00 50.00p 0.00 -7.02

(2) FWD STBD UIWL FLOOD 0.00 50.00s 0.00 -7.02

(3) AFT PORT UIWL FLOOD 328.00a 50.00p 0.00 -7.01

(4) AFT STBD UIWL FLOOD 328.00a 50.00s 0.00 -7.01 Distances in FEET.----------------------------------------------------

NSF McMurdo Offload Infrastructure Weight Estimate Report

B-18 9 June 2023

POSTDELIVERY LOADING CONDITION

Condition Graphic - Draft: 7.02 @ 0.00 Trim: 0.00 deg. Heel: zero

Outboard Profile View

Body @ 164.00a

Critical Points cp1 FWD PORT UIWL cp2 FWD STBD UIWL cp3 AFT PORT UIWL cp4 AFT STBD UIWL

NSF McMurdo Offload Infrastructure Weight Estimate Report

B-19 9 June 2023