Ship Handling for the Mariner Flashcards
In day-to-day work, the most useful unit of measurement for estimating turning circles and other distances is the ship’s own length?
MacElrevey 10 The correct answer is: True
In shallow water a ship’s turning circle is? 1. Larger 2. Smaller 3. The same
MacElrevey 10 & 17-18 The correct answer is: Number 1 Larger
An average-size ship’s turning circle is usually slightly when the ship turns to the right than to the left 1. Larger 2. Smaller 3. The same
MacElrevey 10-11 The correct answer is: Number 1 Larger
A VLCC’s turning circle to the right is usually her turning circle to the left. 1. Larger than 2. Smaller than 3. Nearly the same as
MacElrevey 11 The correct answer is: Number 3 Nearly the same as
When revolutions are increased during a turn, the tactical diameter becomes (or stays)? 1. Larger 2. Smaller 3. The same
MacElrevey 11 The correct answer is: Number 2 Smaller
For a given rudder angle and engine speed, the rate of turn as the depth of water increases 1. increases 2. decreases 3. does not change
MacElrevey 10 & 18 The correct answer is: Number 3 does not change
A ship can be backed and filled in the smallest area when turned to the left?
MacElrevey 11-13 The correct answer is: False
You are aboard an average-sized, loaded, house-aft tanker proceeding through an open roadstead. The wind is blowing hard enough to overcome the normal twisting effect when your ship’s engine goes astern. When you back your ship you would expect her to? 1. Head into the wind when she has headway and back into the wind when she has sternway. 2. Head away from the wind while she has headway and back away from the wind when she has sternway.
MacElrevey 14 The correct answer is: Number 1 Head into the wind when she has headway and back into the wind when she has sternway.
Assuming there are no extraordinary wind, current, or bank effects, a ship should be swinging moderately to before her engine is put astern. 1. Port 2. Starboard
MacElrevey 14-15 The correct answer is: Number one Port
A bow thruster is sometimes preferable to tugs because? 1. It is located at the extreme end of the vessel 2. It is always available 3. It is equally effective at slow and fast speeds
MacElrevey 15-16 The correct answer is: Number 1 It is located at the extreme end of the vessel and Number 2 It is always available
Using a bow thruster has its disavantages: 1. It usually provides less power than a tug 2. It has no effect on headway to slow or hold a ship 3. It can only be used at very light drafts
MacElrevey 15-16 The correct answer is: Number 1 It usually provides less power than a tug and Number 2 It has no effect on headway to slow or hold a ship
A bow thruster is usually quite effective at speeds up to 5 knots.
MacElrevey 15-16 The correct answer is: False
When a ship moves from deep to shallow water; the tactical diameter. 1. increases 2. decreases 3. no significant change
MacElrevey 17-20 The correct answer is: Number 1 increases
When a ship moves from deep to shallow water; twisting effect when backed 1. increases 2. decreases 3. no significant change
MacElrevey 17-20 The correct answer is: Number 1 increases
When a ship moves from deep to shallow water; the rate of turn 1. increases 2. decreases 3. no significant change
MacElrevey 17-20 The correct answer is: Number 3 no significant change
When a ship moves from deep to shallow water; speed loss during a large course change 1. increases 2. decreases 3. no significant change
MacElrevey 17-20 The correct answer is: Number 2 decreases
When a ship moves from deep to shallow water; the speed loss when the engine is stopped 1. increases 2. decreases 3. no significant change
MacElrevey 17-20 The correct answer is: Number 2 decreases
When a ship moves from deep to shallow water; the directional stability. 1. increases 2. decreases 3. no significant change
MacElrevey 17-20 The correct answer is: Number 1 increases
How would you expect the following to affect directional stability: Increased length 1. more positive (or less negative) 2. less positive (or more negative) 3. no significant change
MacElrevey 18-20 The correct answer is: Number 1 more positive (or less negative)
How would you expect the following to affect directional stability: Increased beam. 1. more positive (or less negative) 2. less positive (or more negative) 3. no significant change
MacElrevey 18-20 The correct answer is: Number 2 less positive (or more negative)
How would you expect the following to affect directional stability: Increased drag. 1. more positive (or less negative) 2. less positive (or more negative) 3. no significant change
MacElrevey 18-20 The correct answer is: Number 1 more positive (or less negative)
How would you expect the following to affect directional stability: Decreased UKC. 1. more positive (or less negative) 2. less positive (or more negative) 3. no significant change
MacElrevey 18-20 The correct answer is: Number 1 more positive (or less negative)
How would you expect the following to affect directional stability: Increased Cb. 1. more positive (or less negative) 2. less positive (or more negative) 3. no significant change
MacElrevey 18-20 The correct answer is: Number 2 less positive (or more negative)
How would you expect the following to affect directional stability: More full sections forward. 1. more positive (or less negative) 2. less positive (or more negative) 3. no significant change
MacElrevey 18-20 The correct answer is: Number 2 less positive (or more negative)