MODULE I : SEAKEEPING
Topic: Regular Water Waves
Question 1
Consider a towing tank of length 150m with a wave-maker at one end. For a regular
water wave of period 2 sec. and amplitude 0.2m being gener
MODULE I : SEAKEEPING
Topic: Ship in Wave: Encounter Frequency
Question 1
A ship is advancing at a speed of 16 knots in a regular wave-field of wave-length
200m. For heading angles 180,135,90,45 and 0
MODULE I : SEAKEEPING
Topic: Uncoupled Heave, Roll and Pitch
Question 1
(i)
Write the expressions for undamped natural periods of heave, roll and pitch
motions.
(ii)
Determine the scale factors for th
MODULE I : SEAKEEPING
Topic: Irregular Waves and 2DSspectrum
Question 1
From an irregular wave record, the following statistical information could be found:
wave-height average wave Number of
interval
MODULE II : MANEUVERABILITY
Topic: Motion Stability, Equations of Motion and Hydrodynamic Derivatives
Question 1
Describe by suitable sketches different types of motion stability for a surface ship
An
MODULE II : MANEUVERABILITY
Topic : Definitive Maneuvers
Question 1
Draw a schematic diagram of a 20/10 zigzag maneuver and identify all the terms.
Answer:
The figure is shown below and the terms like
MODULE II : MANEUVERABILITY
Topic: Experimental Determination of Hydrodynamic Derivatives
Question 1
In a straight line test to determine the hydrodynamic derivatives conducted on a 2m
long ship model
MODULE II : MANEUVERABILITY
Topic: Estimation of Hydrodynamic derivatives by Theoretical/Empirical
Methods
Question 1
An estimate for linear damping derivatives can be made from the relations:
'
Yv' =