Diploma in Nautical Science

Ship Construction and Ship Stability – I 

Course Objectives

Familiarize students with the fundamentals and concepts of Ship Construction and parts of the ship. Familiarize students with the fundamentals and concepts of Ship Stability including Displacement, Buoyancy and Density allowance in compliance with Load line regulation. 

Code

CUTM 4135

Course Nature

Compulsory

Theory (T)

2

Practice (Pr)

0

Project (Pj)

0

Credits

2

Contact Hours

44

Course Learning Outcomes

On completion of the course, the students will be able to 

CO1
.Identify and describe the key components of ship construction including general drawings, layout, fittings, structures, and tanks, understanding their roles and interrelationships.

CO2 Explain the significance of load lines, draft, ship dimensions, displacement, buoyancy, and freshwater allowance in ship stability and operational safety. 

CO 3 Apply principles of ship construction and stability to analyse and interpret ship's general drawings, identifying structural components and their functions in relation to stability and operational efficiency.

CO 4 Analyse the impact of design, decisions on ship stability and performance, including considerations of buoyancy, weight distribution, and stability calculations in varying sea conditions. 

CO 5 Compliance with International Load line convention and intact stability criteria. 
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Code – CUTM 4135
Course Title – Ship Construction and Ship Stability - I

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COURSE SYLLABUS
Topics 

SN 1. - Familiarization with Ship Construction, General drawings, Layout, Fittings, Structures, Tanks etc. ) 
- Theory Hours 11

1.1 Sketch Plan view & Profile View Of A General Cargo vessel & Gearless Bulk Carrier And Label The Principal Parts (Bow, Stern, Midship, Port, Starboard, Bulbous Bow, Hull, Bridge, Accommodation, Main Mast, Fore Mast, Jack Staff, Ensign Staff, Bridge, Engine Room, Steering Gear Room, Funnel, Upper Deck, Mast House, Crane, Cargo Hold, Hatch Coaming, Hatch Cover, Booby Hatch, Bulwark, Gunwale, Mooring Winch, Windlass, Fairleads, Rollers, Cross Deck, Poop Deck, Fore Castle Deck, Tanks, Fore Peak Tank, Aft Peak Tanks, Double Bottom Tanks, Stores, Chain Locker, Propeller, Rudder, Keel, Gangway, Porthole, Bulkhead, Collision Bulkhead, Manhole, Weather Tight Doors); 
1.2 Define and Illustrate: Camber, Rise Of Floor, Tumblehome, Flare, Sheer, Rake, Parallel Middle Body, Entrance, Run.; 
1.3 Sketch Double Bottom Tanks, Cargo Tanks, Forepeaks Tank and label Principal parts.; 
1.4 Sketch And Label The Following Parts – Sounding Pipes, Air Pipe with Vent Head And Ventilators. 

SN 2. - Load lines, Draft, Ship Dimensions  - Theory Hours 8

2.1 Explain The Draft Marks, Plimsoll Line, Deck Line, Load Lines And Freeboard. Importance of Loadlines.; 
2.2 Draw Loadline Marks including Plimsoll for a ship. Label the horizontal & vertical distances (EXCLUDE TIMBER LOAD LINE); 
2.3 Draw Draft marks over 2 meters range (ONLY IN METERS); 
2.4 Define And Illustrate: Forward Perpendicular (FP), After Perpendicular (AP), Length Between Perpendiculars (LBP), Length On The Waterline (Wl), Length Overall (LOA), Base Line, Moulded Depth, Beam And Draught, Extreme Depth, Beam, Draught and Air Draft. 

SN 3. -Displacement - Theory Hours 12

3.1 Define The Following:
3.1.1 Density / Relative Density.
3.1.2 Pressure.
3.1.3 Thrust.
3.1.4 Displacement.
3.1.5 Deadweight.
3.1.6 Light Displacement.
3.1.7 Load Displacement.
3.1.8 Deadweight Aboard.
3.1.9 Deadweight Available.
3.1.10 TPC. 
3.1.11 Water Plane Coefficient. 
3.1.12 Block Coefficient. 
3.1.13 Draft. 
3.1.14 Air Draft. 
3.1.15 Numerical on Density, Relative Density, Mass/Volume Of Oil In Tank Considering Expansion. 
3.1.16 Numericals on Water Pressure And Thrust On Bulkhead, Ship Side, Keel, Manhole Of Tank. 
3.2 Describe That For A Ship To Float It Must Displace A Mass Of Water Equal To Its Own Mass (Principle Of Floatation). Numericals Involving Flotation Of Rectangular Box, Cylinder Shaped Body; 
3.3 Explain How When The Mass Of A Ship Changes The Mass Of Water Displaced Changes By An Equal Amount.; 
3.4 Describe That Displacement Is Represented By The Symbol ∆; 
3.5 Explain That Graph Or Scale Can Be Drawn To Show The Relationship Between The Displacement And Mean Draught Of A Ship.; 
3.6 Given A Displacement / Draught Curve, Find :
3.6.1 Displacements For Given Mean Draughts.
3.6.2 Mean Draughts For Given Displacements.
3.7 Explain The Change In Mean Draught When Given Masses Are Loaded Or Dishcharged.
3.8 Find The Mass Of Cargo To Be Loaded Or Discharged To Produce A Required Change Of Draught (for Even Keel situation).
3.9 Uses A Dead Weight Scale To Find The Dead Weight And Displacement Of A Ship At Various Draughts In Seawater.
3.10 Uses A Deadweight Scale To Determine The Change In Mean Draught Resulting From Loading Or Discharging A Given Tonnage.
3.11 Given The Present Draughts And The Density Of Dock Water, Calculates The Draughts In Sea Water.
3.12 Uses A Ship’s Hydrostatic Particulars And Given Mean Draughts To Determine The Approximate Weight Loaded Or Discharged.; 
3.13 Explain Why TPC Varies With Draughts.; 
3.14 Use A Dead Weight Scale To Obtain TPC At Given Draug;3.15 Use TPC Obtained From The Displacement To Find : 
3.15.1 The Change Of Mean Draught When Given Masses Are Loaded Or Discharged. 
3.15.2 The Mass Of Cargo To Be Loaded Or Discharged To Produce A Required Change Of Draught. Use Formula : Cargo To Load (Discharge) = Mean Sinkage 
(Rise) in cm x TPC. Discuss The Limitation Of Formula As It Is True Only For Small Change In Draft.; 
3.16 Calculate Cb From Given Displacement And Dimensions. hts.; 
3.17 Calculate Displacement From Given Cb And Dimensions. 

SN 4. -Buoyancy And Fresh Water Allowance (Course Outcome-CO1,CO2,CO3)
- Theory Hours 13

4.1 Explain What Is Meant By “Buoyancy”.; 
4.2 Define the Force Of Buoyancy As An Upward Force On A Floating Object Created By The Pressure Of Liquid On The Object. 
4.3 State That The Buoyancy Force Is Equal To The Displacement of A Floating Object. Numericals On Determining Position Of 'Centre Of Buoyancy' And 'Centre Of Gravity' On Box Shaped And Triangular Shaped Vessels. 
4.4 Explain What Is Meant By “Reserve Buoyancy”. 
4.5 Explain How Freeboard Is Related To Reserve Buoyancy.
4.6 Calculate The Reserve Buoyancy Of A Box Shape V/L Whose Dimensions And Displacement Is Known.
4.7 Explain The Terms “Fresh Water Allowance” & “Dock Water Allowance”.
4.8 Explain Why The Draught of A Ship Decreases When It Is Passes From Fresh Water To Seawater And Vice Versa.
4.9 State That When Loading In Fresh Water Before Proceeding Into Seawater, A Ship Is Allowed A Deeper Maximum Draught.
4.10 State That The Additional Draught Is Called The Fresh Water Allowance (FWA).
4.11 Given The FWA And TPC For Fresh Water, Calculate The Amount Which Can Be Loaded After Reaching The Summer Load Line When Loading In Fresh Water Before Sailing Into Seawater.
4.12 Uses A Hydrometer To Find The Density Of Water. Describe The Difference Between Loadline Hydrometer And Draft Survey (Zeal) Hydrometer.; 
4.13 Given The Density Of Dock Water And Tpc For Sea Water, Calculate The TPC For Dock Water.4.14 Given The Density Of Dock Water And FWA, Calculates The Amount By Which The Appropriate Load Line May Be Submerged.; 
4.15 Given The Present Draught Amidships And The Density Of Dock Water, Calculate The Amount To Load To Bring The Ship To The Appropriate Load Line In Sea Water.
4.16 Use Tank Sounding Booklet To Obtain Volume Of Water, KG Of Water, In The Tank For Given Sounding Or Ullage.
4.17 Calculate Weight Of Water In The Tank. 
4.18 Describe Why WNA Mark Is Situated 50mm Below The Winter Line For The V/L Less Than 100m In Length.
4.19 Given The Summer Draft, Calculate The Distance Between The Winter & Summer, Summer & Tropical Draft.
4.20 Given The Present Draft, Summer Draft And Tpc, Calculate The Quantity Of Cargo To Be Loaded / Discharged To Reach At Desired Load Line.