ship design project final presentation

SHIP DESIGN PROJECT & PRESENTATIONNAME 338

•

A PRESENTATION ON THE DESIGN OF AN 2900 TONNESCAPACITY OIL TANKER

Supervised by

Dr. Md. Sadiqul Baree Professor Department of Naval Architecture & Marine Engineering , BUET

Designed byMohammad Kifayath Chowdhury Student No: 1112023Mahmudur RahmanStudent No: 1112049

OBJECTIVE

Ship Type : Oil Tanker

Capacity : 2900 tonnes

Route : Chittagong to Dhaka

Speed : 10 knots

Classification : • According to GL Rules & Guidance 2013Regulations• IMO stability Guideline• THE INLAND SHIPPING ORDINANCE 1976

CLASS & REGULATIONS FOLLOWED

PRESENTATION CONTENTS• Principal particulars• Updated general arrangement• Lines plan• Hydrostatic calculation & curves• Scantling• Resistance and power calculation• Engine & gearbox selection• Engine foundation• Rudder design and steering arrangement• Updated propeller & shafting design• Modified lightweight calculation• Modified capacity plan• Updated trim calculation• Updated stability calculation

PRINCIPAL PARTICULARS Length overall( LOA ): 80.3 m

Length between perpendiculars ( LBP ): 77.3 m

Moulded breadth ( B ): 15 m

Moulded depth ( D ): 5.94 m

Moulded draught ( H ) : 3.7 m

Block co-efficient ( CB ) : 0.84

Frame spacing a=0.6m

Web frame spacing

MANNING• Owner : 1 person• 1st class master : 1 person• 2nd class master : 1 person• Sailor : 7 persons• Inland Marine engineer : 1 person• 1st class Driver : 1 person• Greezer : 3 person• Pumpman : 1 person• Cook & Assistant cook : 2 person Total : 18 person [INLAND SHIPPING LAWS AND RULES]

UPDATED GENERAL ARRANGEMENT DRAWING

LINES PLAN DRAWING

OFFSET TABLEWaterline spacing=925 mmStation spacing=7965 mmThe lines plan is modified from Series 60 lines plan of CB 0.8.

Half Breadth (mm) Height above keel(mm)

No.of St. keel WL-1 WL-2 WL-3 WL-4 Deck at Side Keel BTK-A BTK-B BTK-C0 0 0 0 0 0 6211 3331 3792 4570 0

0.5 0 4319 5450 6170 6654 7382 0 110 1316 52651 0 6259 6910 7167 7300 7487 0 17 170 2959

1.5 0 7020 7315 7414 7455 7500 0 5 66 13392 0 7294 7429 7472 7488 7500 0 3 45 7013 0 7392 7463 7486 7495 7500 0 3 38 4784 0 7424 7473 7490 7497 7500 0 3 35 4065 0 7430 7478 7491 7498 7500 0 3 34 3916 0 7425 7481 7493 7499 7500 0 3 33 4117 0 7407 7482 7495 7499 7500 0 3 33 4658 0 7352 7462 7483 7490 7500 0 3 33 587

8.5 0 7150 7343 7398 7423 7498 0 4 42 10649 0 6476 6815 6950 7029 7271 0 13 128 1983

9.5 0 4574 5002 5179 5352 5929 0 103 1257 010 0 0 0 0 0 329 0 0 0 0

HYDROSTATIC CALCULATION & CURVES

Water plane

Dis(m^3)

Midship Area(m^2)

Awp(m^2)

TPC(t/cm) CM CB BMT(m) LCF(m)

1 569.094 8.011 1010.66 10.107 0.58 0.54 29.426 1.0652 1637.947 22.939 1034.38 10.344 0.83 0.77 10.750 0.9573 2625.034 36.224 1040.84 10.408 0.87 0.82 6.797 0.9504 3692.992 50.652 1074.79 10.748 0.91 0.84 4.978 0.050

Water plane BML(m)

MCT1(tonnes.m/m) KB KMT(m) KML(m)

LCB from midship

(m) Cw

Cp

1 709.665 52.996 0.78 30.21 710.45 0.168 0.884 0.932

2 259.038 55.56 1.11 11.86 260.15 0.05 0.903 0.935

3 163.913 56.16 1.59 8.39 165.51 -0.107 0.905 0.945

4 128.073 59.84 2.037 7.016 130.11 -0.211 0.906 0.922

Updated Hydrostatic Particulars:

HYDROSTATIC CURVES WITH THE COMPARISON WITH PREVIOUS CALCULATION DATA

0.000 10.000 20.000 30.000 40.0000.0000.6251.2501.8752.5003.1253.750

T vs BMTUpdated Previous

BMT(m)

Draft

(m)

0.82 0.84 0.86 0.88 0.9 0.92 0.94 0.960

0.51

1.52

2.53

3.54

DRAFT VS Cp CURVEUpdated Previous

Cp

DRAF

T

900.000 950.000 1000.000 1050.000 1100.0000.000

0.625

1.250

1.875

2.500

3.125

3.750 T vs WPA Updated Previous

AW (m^2)

Draft

(m)

0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.900.000.310.630.941.251.561.882.192.502.813.133.443.754.06 T vs CB

Updated Previous

CB

Draft

(m)

0.000 200.000 400.000 600.000 800.0000.000

0.625

1.250

1.875

2.500

3.125

3.750 T vs BML Updated Previous

BML(m)

Draft

(m)

0.000 1000.000 2000.000 3000.000 4000.0000.0000.6251.2501.8752.5003.1253.750 T vs ▼

Updated Previous

Displacement (m^3)

Draft

(m)

0.000 200.000 400.000 600.000 800.0000.000

0.625

1.250

1.875

2.500

3.125

3.750 T vs KML Updated Previous

KML(m)

Draft

(m)

0.550 0.600 0.650 0.700 0.750 0.800 0.850 0.900 0.950 1.000 1.0500.000

0.625

1.250

1.875

2.500

3.125

3.750 T vs CM Updated Previous

Cm

Draft

(m)

5.000 10.000 15.000 20.000 25.000 30.000 35.0000.000

0.625

1.250

1.875

2.500

3.125

3.750 T vs KMTUpdated Previous

KMT(m)

Draft

(m)

0.000 0.200 0.400 0.600 0.800 1.000 1.2000.000

0.625

1.250

1.875

2.500

3.125

3.750 T vs LCF Updated Previous

LCF (m)

Draft

(m)

9.000 9.500 10.000 10.500 11.0000.0000.6251.2501.8752.5003.1253.750

T vs TPC Updated Previous

TPC(t/cm)

Draft

(m)

0.875 0.88 0.885 0.89 0.895 0.9 0.905 0.910

0.51

1.52

2.53

3.54

DRAFT VS Cw CURVEUpdated Previous

Cw

DRAF

T

40.000 45.000 50.000 55.000 60.000 65.0000.0000.6251.2501.8752.5003.1253.750

T vs MCT1 Updated Previous

MCT 1(tonnes.m/cm)

Draft

(m)

-0.400 -0.200 0.000 0.200 0.400 0.600 0.800 1.0000.0000.6251.2501.8752.5003.1253.750

T vs LCB Updated Previous

LCB(m)

Draft

(m)

UPRIGHT HYDROSTATIC CURVE FROM MAXSURF

FORM CURVES

BONJEAN CURVE

SCANTLING

Previous UpdatedFlat Keel Plate 11 mm 11 mmBottom plate 9 mm 9 mmBilge plate thickness 9 mm 9 mmInner Bottom Thickness 6 mm 6 mmSide shell plate thickness 8 mm 8 mmShear strake 8 mm 8 mmStrength deck plating: 7 mm 7 mmCenter Girder 10 mm 10 mmFloor plate 9 mm 9 mmBracket thickness 10 mm 10 mmCollision Bulkhead plating 6 mm 7 mmOther Bulkhead plating 5 mm 5 mmLongitudinal Bulkhead Plating 7 mm 7 mmWeb plate thickness 9 mm 9 mmSuperstrtc. Side plate 7 mm 7 mmSuperstrtc. Deck plate 7 mm 6 mm

PLATES

STRUCTURAL MEMBERS Dimension Dimension

Item Previous UpdatedCenter girder T- 1000× 100× 10 T- 1000× 100× 10

Bottom Side girder T 1000x100x8 T 1000x100x7Bottom longitudinal L- 120x60x8 L- 120x70x7

Inner bottom longitudinal L- 120x60x8 L- 120x70x7Side stringer T 200x140x6 T 210x150x6Web frame T 360x190x7 T 430x220x8

Side longitudinals L- 120x60x8 L- 140x50x7Deck girder T 180x100x8 T 200x110x8Deck web T 80x60x8 T 130x80x6

Deck longitudinals L 80x60x7 L 90x70x6Bulkhead stiffener L- 40x20x6 L- 40x40x6

Superstrtc. Deck girder T 170x90x6 T 90x50x6Superstrtc. Side stringer T 120x60x8 T 80x40x6

RESISTANCE & POWER CALCULATION

Ship Speed, V 10 knots

Parameter Symbol Values Unit

1. Frictional resistance(Added form factor 1+k1) RF 44.9 KN

2. Appendage Resistance RAPP 1.060498788 KN

3. Wave Resistance RW 4.451403735 KN

4. Additional pressure resistance dueto bulbous bow RB 0 KN

5. Additional pressure resistance ofimmersed transom stern RTR 0 KN

6. Model-ship correlation resistance RA 11.62453858 KN

Total resistance RF(l +kl ) + RAPP + Rw + RB + RTR + RA

62.147 KN

Effective Power PE 319.6861054 KW

Summary of Resistance from Prediction Method by Holtrop & Mennen.

Effective Power PE RT*V 319.6861054 KW

Wake fraction w 0.395 CB + 10 CVCB - 0.23 D/√(BT) 0.283452298

Thrust deduction factor t k*w 0.255107069

Relative rotative effic. ƞR

1.02

Shaft efficiency ƞs

0.97

Open water efficiency ƞo

0.47

Hull Efficiency ƞH

(1-t)/(1-w) 1.03955805

QPC 0.498364129

Delivered Power PD

641.4709379 KW

859.8806137 HP

Shaft Power PS

661.3102452 KW

886.4748595 HP

Gear efficiency ƞg

0.975

Break Power PB

678.2669182 KW

909.2049841 HP

20% Service margin 813.9203018 KW

1091.045981 HP

Power Calculation:

ENGINE & GEARBOX SELECTION

Engine:MAN 9L 16/24Rpm: 120060Hz, 990 KW85% MCR: 841.5 KW=1128.01 HPSFC=197 g/KW-Hr

Gear box selection: Gear ratio 3.4 Shandong Guomao P, V (B) Series Bevel-helical Gear Unit.

ENGINE FOUNDATION

DimensionITEMS Previous Updated

FLOOR PLATE 10 mm ( Thickness ) 10 mm ( Thickness )Bottom Plating 11 mm (Thickness) 11 mm (Thickness)

INNER BOTTOM PLATING 8 mm ( Thickness ) 8 mm ( Thickness )

Longitudinal girders 14mm ( Thickness ) 15mm ( Thickness )

Foundation bolts 25 mm ( Diameter ) 25 mm ( Diameter )Face Plate Thickness 20 mm 20 mm

Top plate dimension 285 mm 295 mm ( Width )

Summary

RUDDER DESIGN & STEERING ARRANGEMENT

Rudder Area , A 5.007 m2

Aspect ratio 1.75

Rudder Height , b 2.96 m

Rudder Breadth , c 1.69 m

Rudder Torque, Qr 15358.22 Nm

Item Number Items Dimensions Material

1 Rudder stock Diameter 100mm Forged steel 2 Coupling bolts Diameter 13.5 mm Forged steel 3 Coupling flanges Thickness 12.15 mm Forged steel

4 Horizontal web Spacing 550mm Forged steel 5 Vertical web Spacing 832mm Forged steel 6 Web plate Thickness 8mm Forged steel 7 Rudder plate Thickness 12 mm Forged steel 8 Pintle Diameter 128 mm Forged steel 9 Liner Thickness 22 mm Bronze 10 Neck bearing Height 190 mm Forged steel 11 Carrier bearing Height 190 mm Forged steel 12 Tiller Diameter 72 mm Forged steel 13 Link chain Diameter 10 mm Forged steel 14 Steering rod Diameter 15 mm Forged steel 15 Bush Thickness 4 mm Lignum vitae

Various rudder components and their corresponding dimensions:

STOCK DETAILS

Diameter of tiller as

Diameter of link chain

Diameter of steering rod

Selected Steering Gear: MS25-35 Maker: Hydrostar

STEERING ARRANGEMENT

UPDATED PROPELLER & SHAFT DESIGN

Updated Particulars Previous ParticularsNumber of Blade 4 4RPM 353 300Propeller Diameter 1.999m 2.23mPitch 1.325m 1.48mProjected Blade area 1.577m2 2.02m2

Developed Area 1.723m2 2.2055m2

BAR 0.55 0.55Efficiency,η 0.47 0.51

PROPELLER CHARACTERISTICS

Updated particulars Previous particulars

Gear ratio 3.4 4 Shaft speed 353 RPM 300 RPM

Length of shaft 3.912 m 3.912 m

Tensile strength of shaft material 760 N⁄mm 760 N⁄mm

Diameter of the shaft 113 mm 87 mm

Thickness of coupling flange 22.6 mm 17.247 mm

SHAFT DESIGN

Shaft DetailsSL. NO DESCRIPTION MATERIALS NUMBER OF COMPONENT

1 Cone nut M.B. BS 1

2 Cone nut securing screw M.B. BS 2

3 Propeller key M.B. BS 14 Propeller dia X pitch M.B. BS 15 Aft. Brg . securing screw M.B. BS 3

6 Cover plate securing screw STEEL BS 3

7 Aft locking ring STEEL BS 18 Cover plate STEEL BS 1

9 Lock ring securing screw STEEL BS 3

10 Forward locking ring STEEL BS 111 Rubber bearing 12 Sterntube STEEL BS 113 Tailshaft 114 Forward gland housing G.M. BS 115 Forward bearing G.M. BS 1

16 Greasy packing GRAPHITED ASBESTOS 3 turns

17 Gland ring G.M. BS 118 Gland studs and nuts M.B. BS 219 Coupling key STEEL BS 120 Half coupling STEEL BS 121 Backing washer STEEL BS 122 Locking nut STEEL En7 BS 123 Sealing ring BS 1

24 Fwd.brg. securing screw M.B. BS 1

25 Bearing lock ring STEEL BS 1

MODIFIED LIGHTWEIGHT CALCULATION

NAME OF ITEMS WEIGHT OF ITEMS(Tonnes)

VCG about KEEL (m)

LCG about AMIDSHIP(t-m)

MOMENT about AMIDSHIP

(t-m)QUANTITY MOMENT about KEEL(t-m)

PARALLEL MIDDLE BODY

Deck beam 20 3.785041622 5.94 22.48314723 2.63448 9.971616Deck girder 4 3.68817751 5.94 21.90777441 2.63448 9.71643

Deck longitudinal 12 7.893599427 5.94 46.8879806 2.63448 20.79553

Side stringer 4 3.56448863 2.587 9.221332086 2.63448 9.390574Side longitudinal 18 7.842999431 2.587 20.28983953 2.63448 20.66223

Centre girder 1 6.184443995 0.5 3.092221998 2.63448 16.29279Side girder 4 13.49333235 0.59 7.961066089 2.63448 35.54791

Bottom longitudinal 14 6.47679953 0.06 0.388607972 2.63448 17.063Inner bottom longitudimal 12 6.47679953 0.97 6.282495544 2.63448 17.063

Transverse bulkhead 6 27.37500023 2.97 81.30375069 2.52471 69.11394

Longitudinal bulkhead 1 24.40044267 2.97 72.46931474 2.63448 64.28248Bulkhead stiffener 56 1.905778705 3.56 6.784572189 2.52471 4.811539

Web frame 20 3.004728722 2.97 8.924044303 2.63448 7.915898Web floor 20 20.01888662 0.57 11.41076538 2.63448 52.73936

Web floor stiffener 204 1.75785678 0.57 1.001978365 2.63448 4.631039

Ballast water partition 2 40.92977481 3.6 147.3471893 2.63448 107.8287Bracket 272 3.691499238 3.6 13.28939726 2.63448 9.725181

Deck plate 59.37066236 5.94 352.6617344 2.63448 156.4108Keel plate 8.6685369 0.055 0.47676953 2.63448 22.83709

Bottom plate 42.843231 0.055 2.356377705 2.63448 112.8696

Bilge plate 42.074841 0.53 22.29966573 2.63448 110.8453Shell plate 52.25052 3.6 188.101872 2.63448 137.6529

Pipes, pumps & accessories 9.33045 3.4 31.72353 2.63448 24.58088Fender 1.591665 6 9.54999 2.63448 4.19321

Inner bottom plate 1 51.756555 1.004 51.96358122 2.63448 136.3516Total 450.3761111 1140.178998 0 1183.293

ENTRANCE

Anchor 1 3.18333 7.8 24.829974 36.8827 117.4099Mooring ropes 0.933045 7.6 7.091142 36.5534 34.10598

Chain cable 1 3.018675 7.8 23.545665 35.1264 106.0352Stringers 1.042815 3.6 3.754134 32.931 34.34094Bollard 4 0.65862 8 5.26896 36.8827 24.2917

Hawse pipes 0.164655 7.8 1.284309 36.5534 6.018702Stem bar 1 1.701435 6.4 10.889184 42.0419 71.53158

Forecastle deck plate 9.00114 7.25 65.258265 36.2241 326.0582Searchlight 1 0.10977 8.85 0.9714645 42.0419 4.61494Keel plate 0.735459 0.055 0.040450245 31.7652 23.36203

Bottom plate 3.51264 0.055 0.1931952 31.7652 111.5799Bilge plate 3.545571 0.53 1.87915263 32.931 116.7592Shell plate 3.819996 3.6 13.7519856 32.931 125.7963

Pipes, pumps & acessories 2.08563 3.5 7.299705 31.7652 66.25054Bracket 0.32931 3.5 1.152585 32.1516 10.58785

Deck girder 4 0.954999 8.9 8.4994911 32.1516 30.70478Deck longitudinal 12 1.920975 8.9 17.0966775 32.1516 61.76248

Side stringer 3 1.064769 3.7 3.9396453 32.1516 34.23406Side longitudinal 10 0.757413 3.7 2.8024281 32.1516 24.35206

Centre girder 1 0.636666 0.55 0.3501663 32.1516 20.46985 Side girder 4 2.030745 0.59 1.19813955 32.1516 65.29177

Bottom longitudinal 12 0.976953 0.06 0.05861718 32.1516 31.41063Inner bottom longitudimal 10 1.042815 0.97 1.01153055 32.1516 33.52821

Collision bulkhead 1 6.289821 3.96 24.90769116 36.8827 231.9857Wash bulkhead 1 3.830973 3.96 15.17065308 38.4195 147.1841

Bulkhead stiffener 12 2.030745 4 8.12298 32.931 66.87446Web frame 4 0.450057 2.97 1.33666929 34.2318 15.40625Web floor 4 2.568618 0.57 1.46411226 34.2318 87.92835

Web floor stiffener 24 0.384195 0.57 0.21899115 35.0166 13.45321Inner bottom plate 6.641085 1.004 6.66764934 35.0825 232.9858

Deck beam 4 1.042815 8.9 9.2810535 34.2318 35.69741Total 66.465735 269.3366665 0 2312.012


VCG about KEEL (m)





VCG about KEEL (m)




RUNPropeller 1 2.08563 1.28 2.6696064 -37.761 -78.75522

Propeller shaft 1 1.042815 1.27 1.32437505 36.6632 38.23291Rudder & steering arrangement 1 2.579595 3.32 8.5642554 -38.192 -98.5206

Engine 1 15 1.5 22.5 -31.605 -474.0747Gear box 1 1.920975 1.29 2.47805775 -32.821 -63.04876

Transverse bulkhead 2 8.507175 3.13 26.62745775 -32.821 -279.2159Wood , outfits & accessories 76.839 10.2 783.7578 -30.406 -2336.389

Stairs & railing 2.1954 12.5 27.4425 -31.284 -68.68188Funnel & mast 1.64655 14.6 24.03963 -39.517 -65.06705

Bollard & capstan 6 1.0977 6.9 7.57413 -39.473 -43.32983Mooring ropes 1.31724 6.9 9.088956 -34.171 -45.01194

Hatch & hatch coaming 2.74425 6.4 17.5632 -31.592 -86.69581Auxiliary machinery 3.18333 2.1 6.684993 -28.979 -92.25061

Generator 3.2931 2.3 7.57413 -29.199 -96.15463Engine foundtion scantling weight 2.85402 1.1 3.139422 -30.904 -88.19934

Deck beam 6 1.470918 5.94 8.73725292 -33.141 -48.74719Deck girder 4 1.56619836 5.94 9.303218258 -33.141 -51.90485

Deck longitudinal 12 2.52471 5.94 14.9967774 -33.141 -83.67056Side stringer 4 1.712412 2.587 4.430009844 -33.141 -56.75047

Side longitudinal 8 1.284309 2.587 3.322507383 -33.141 -42.56285Centre girder 1 1.42701 0.55 0.7848555 -33.141 -47.29205

Side girder 4 4.654248 0.59 2.74600632 -33.141 -154.2449Bottom longitudinal 12 1.405056 0.06 0.08430336 -33.141 -46.56448

Inner bottom longitudimal 10 1.405056 0.97 1.36290432 -33.141 -46.56448Bulkhead stiffener 12 2.30517 3.56 8.2064052 -33.141 -76.39486

Web frame 6 1.108677 2.97 3.29277069 -33.141 -36.74229Web floor 6 7.815624 0.55 4.2985932 -33.141 -259.0149

Web floor stiffener 48 0.603735 0.55 0.33205425 -33.141 -20.00818Bracket 64 0.713505 3.6 2.568618 -33.141 -23.64603

Deck plate 13.28217 5.94 78.8960898 -29.857 -396.5716Keel plate 1.602642 0.055 0.08814531 -30.947 -49.59769

Bottom plate 8.605968 0.055 0.47332824 -33.151 -285.2925Bilge plate 8.441313 0.53 4.47389589 -31.943 -269.6415Shell plate 10.4018052 3.6 37.44649872 -31.943 -332.2656

Pipes, pumps & acessories 4.61034 3.2 14.753088 -39.407 -181.6817Others 3.84195 3.1 11.910045 -37.322 -143.3885

Inner bottom plate 6.36666 1.004 6.39212664 -34.578 -220.1435Super structure 0 0 0 0

Deck girder 10 3.051606 10.14 30.94328484 -29.956 -91.41462Deck longitudinal 24 2.140515 10.14 21.7048221 -29.956 -64.12177

Deck plate 3 21.51492 10.9 234.512628 -29.089 -625.8486Side stringer 8 1.0779414 10.4 11.21059056 -36.171 -38.99066

Side longitudinal 14 2.206377 10.36 22.85806572 -36.171 -79.80777Superstructure shell plate 15.532455 10.13 157.3437692 -35.017 -543.8942

FRONT &back plate 15.58734 11.17 174.1105878 -35.675 -556.0823Roof of wheel house 1 0.98793 13 12.84309 -29.956 -29.59466

Total 265.494991 1835.454846 0 -8779.607

Total lightweight =782.336 tonne

LCG= -6.754 m

VCG=4.147 mOur preliminary assumed lightweight was 730.4 tonnes

So here we have a difference of lightweight of (782.336-730.4) or 51.936 tonnes.

MODIFIED CAPACITY PLAN

Frames Port (Tonne) Starboard(Tonne) LCG From Amidship (m) VCG From keel (m)

Oil tank 1 106-120 156.11064 156.11064 28.73 3.47

Oil tank 2 89-106 237.57132 237.57132 19.47 3.47

Oil tank 3 72-89 253.87824 253.87824 9.49 3.47

Oil tank 4 56-72 237.95436 237.95436 -0.313 3.47

Oil tank 5 39-56 253.49688 253.49688 -10.115 3.47

Oil tank 6 22-39 253.7724 253.7724 -20.23 3.47

Hatch 25-38 57.6576 57.6576 -20.23 6.44

CARGO TANK CAPACITY

Total Tank Volume 3453.432 m3

TOTAL CAPACITY OF OIL 2900.88288 TONNE

COMBINED MOMENT OF ALL OIL TANKS FROM AMIDSHIP 5162.40668 tonnes-m

COMBINED LCG OF ALL OIL TANKS FROM AMIDSHIP 1.779598451 m

COMBINED MOMENT OF ALL OIL TANKS FROM KEEL

10408.54974 tonnes-m

COMBINED VCG OF ALL OIL TANKS FROM KEEL 3.588062727 m

BALLAST TANK CAPACITYTotal Ballast Capacity

Volume (m3)

Capacity(m3)

LCG(m)

Moment(tonnes-m) VCG(m)

Moment(tonnes-m)

Aft Peak Tank 18.288 17.00784 -39.416 -670.3810214 4.987 84.818

Fore Peak Tank 82.576 76.79568 35.12 2697.064282 3.11 238.83

Ballast Tank 1 65.196 60.63228 28.136 1705.94983 0.512 31.0437Ballast Tank 2 130.798 121.64214 19.48 2369.588887 0.52 63.253Ballast Tank 3 139.844 130.05492 9.474 1232.140312 0.523 68.018Ballast Tank 4 132.194 122.94042 -0.312 -38.35741104 0.524 64.420Ballast Tank 5 139.056 129.32208 -10.091 -1304.989109 0.526 68.023Ballast tank 6 129.916 120.82188 -20.122 -2431.177869 0.532 64.277SUM 837.868 779.21724 22.269 3559.8379 11.234 682.690

LCG with all ballast tank Full=4.56m

VCG with all ballast tank Full=0.876m

Total Ballast Capacity= 779.2 tonnes (Keeping 7% allowance for the structural components)

SUMMARY

BALLAST WATER WEIGHT 6 Tonnes

TOTAL MOMENT OF ALL BALLAST TANK ABOUT AMIDSHIP -236.496 Tonnes-m

TOTAL WEIGHT OF OIL IN ALL OIL TANKS 2900.8 TonnesTOTAL MOMENT OF ALL OIL TANK ABOUT AMIDSHIP 5162.88 Tonnes-m

WEIGHT OF OTHER DEADWEIGHT ITEM 22 TonnesTOTAL MOMENT OF OTHER DEADWEIGHT ITEMS ABOUT AMIDSHIP -770 Tonnes-m

TOTAL WEIGHT OF STRUCTURAL ITEMS IN THE SHIP 782.336 TonnesTOTAL MOMENT OF STRUCTURAL ITEMS IN THE SHIP -4966.268 Tonnes-m

TOTAL WEIGHT 3711.136 Tonnes

LCG OF THE WHOLE SHIP ABOUT AMIDSHIP -0.2182308 m

LCG OF SHIPFULL LOADED

LCG OF SHIPBallast Condition (Aft peak and ballast tank 6 filled)

BALLAST WATER WEIGHT 212.492 Tonnes

TOTAL MOMENT OF ALL BALLAST TANK ABOUT AMIDSHIP 3559.8379 Tonnes-mWEIGHT OF OTHER DEADWEIGHT ITEM 22 TonnesTOTAL MOMENT OF OTHER DEADWEIGHT ITEMS ABOUT AMIDSHIP -770 Tonnes-m

TOTAL WEIGHT OF STRUCTURAL ITEMS IN THE SHIP 782.336 TonnesTOTAL MOMENT OF STRUCTURAL ITEMS IN THE SHIP -4966.268 Tonnes-m

LCG OF THE WHOLE SHIP ABOUT AMIDSHIP -1.3143995 m

BALLAST WATER WEIGHT 6 TonnesTOTAL MOMENT OF ALL BALLAST TANK ABOUT AMIDSHIP 29.922 Tonnes-m

TOTAL WEIGHT OF OIL IN ALL OIL TANKS 2900.8 Tonnes

TOTAL MOMENT OF ALL OIL TANK ABOUT KEEL 10408.55 Tonnes-m

WEIGHT OF OTHER DEADWEIGHT ITEM 22 TonnesTOTAL MOMENT OF OTHER DEADWEIGHT ITEMS ABOUT AMIDSHIP 87.12 Tonnes-m

TOTAL WEIGHT OF STRUCTURAL ITEMS IN THE SHIP 782.336 TonnesTOTAL MOMENT OF STRUCTURAL ITEMS IN THE SHIP 3223.22 Tonnes-m

VCG OF THE WHOLE SHIP ABOUT AMIDSHIP 3.704744854 m

VCG of shipFULL LOADED

VCG of shipBallast Condition

BALLAST WATER WEIGHT 212.492 Tonnes

TOTAL MOMENT OF ALL BALLAST TANK ABOUT AMIDSHIP 179.1371 Tonnes-m

WEIGHT OF OTHER DEADWEIGHT ITEM 22 Tonnes

TOTAL MOMENT OF OTHER DEADWEIGHT ITEMS ABOUT AMIDSHIP 118.8 Tonnes-m

TOTAL WEIGHT OF STRUCTURAL ITEMS IN THE SHIP 782.336 Tonnes

TOTAL MOMENT OF STRUCTURAL ITEMS IN THE SHIP 3223.22 Tonnes-m

VCG OF THE WHOLE SHIP ABOUT AMIDSHIP 3.462883693 m

Preliminary deadweight= 2921.557 tonnesUpdated deadweight = 2928.8 tonnesDeadweight Difference = 7.24 tonnes Lightweight Difference =51.936 tonnesPreliminary assumed displacement with deadweight co-efficient 0.8= 3651.96 tonnesUpdated displacement = 3711.136 tonnesDifference = 59.176 tonnesTo compensate for the additional displacement CB of the ship was increased from 0.83 to 0.84.

UPDATED TRIM CALCULATION

Units Previous UpdatedDisplacement Tonnes 3688 3711.136LOA M 76.2 80.3Draft M 3.96 3.7LCG m(aft) 0.066 0.218LCB m(aft) -0.816 0.212MCT 1m tonne – m/m 4932.77 5984.23LCF m 0.046 0.05Trim m 0.659429894 0.003720916Aft Trim M 0.329316866 0.001858141Fore Trim m 0.219497167 0.000930939Aft Draft m 4.289316866 3.701858141Fore draft m 3.740502833 3.699069061

Here,TRIM=(LCG-LCB)*∆ /MCT 1mChange in Draft Aft=(L/2-CF)*Trim/LFinal Draft Aft=Draft+Change in Draft AftFinal Draft Forward=Draft-Change in Draft AftSo the ship is trimmed by stern.

FULL LOAD CONDITION

UPDATED STABILITY CALCULATION

RIGHTING LEVER CURVE FOR BALLAST CONDITION

IMO VALIDITY( IMO A.749(18) CH3)

Parameter IMO min value Obtained value Remarks

Area up to 30 degree 0.055 m radian 1.15 Satisfied


Area between 30 to 40 degree 0.03 m radian 0.512 Satisfied

GZ maximum 0.20m at ≥30 deg 2.986 Satisfied

RIGHTING LEVER CURVE FOR FULL LOADED CONDITION

IMO VALIDITY (IMO A.749(18) CH3)

Parameter IMO minimum value Obtained value Remarks



Area between 30 to 40 degree 0.03 m radian 0.258 Satisfied

GZ maximum 0.20m at ≥30 deg 1.506 Satisfied

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