GSK Exit Exam • Set 9 Question 14 of 30

What is the function of the bilge keel attached to a ship's hull outer shell plating?

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Direct Answer

Option A: Reduce roll amplitude and damp rolling motion in heavy seas

Bilge keels are longitudinal fins fitted at the turn of the bilge to increase hydrodynamic resistance to rolling. By creating turbulence and damping the vessel's natural roll period, they significantly improve ship stability and crew comfort in heavy seas, adhering to fundamental principles of naval architecture and ship construction.

All Options

A

Reduce roll amplitude and damp rolling motion in heavy seas (Correct Answer)

B

Support drydock blocks

C

Protect propeller from ice

D

Increase vessel speed

Detailed Explanation & Context

Bilge keels are longitudinal fins fitted at the turn of the bilge to increase hydrodynamic resistance to rolling. By creating turbulence and damping the vessel's natural roll period, they significantly improve ship stability and crew comfort in heavy seas, adhering to fundamental principles of naval architecture and ship construction.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • General Ship Knowledge (GSK).

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