General Flashcards
What is The single most common cause of accidents in ship-work?
Human error
Jeff 211
What is the dominant factor in determining the allocation of rotational versus lateral motion that results from a lateral force applied to the ship?
Center of Lateral Resistance (CLR)
Jeff 217
Center of Lateral Resistance moves ______ as the ship gains headway and shifts _____ as the ship gains sternway.
Forward; aft
Jeff 217
What is the term for tides when the sun and moon are approximately inline with the earth, both tractive forces working together to affect tide.
Spring tides
Bowditch p 566
With azipods, turning pod control to port will move the stern to_____
Port. Similar to tillers, reverse of conventional wheel helms.
Mac 61
Azipods in “harbor mode,” aka “bicycle mode,” position pods in which configuration?
Pods angled out at 45 degrees. Similar to a bike, go ahead on the starboard, and astern on the port, turns ships head to port.
Mac 62
As a ship begins to make way through the water, she undergoes a change of mean draft, called ______
Sinkage
Mac 85
What is the term for the combined sinkage and trim, for a vessel making way?
Squat
Mac 85
A typical tonnage-to-HP ratio for a bulker might be ______
5.0
Mac 248
A typical tonnage-to-HP ratio for a containership might be ______
1.1
Mac 248
A typical tonnage-to-HP ratio for a VLCC might be ______
9.5
Mac 248
1 ton of bollard pull equates to how many HP?
100 HP = 1 ton bollard pull
Hooyer 15
Longitudinal resistance equates to ____ percent of propulsion force under constant speed.
25 %
Hooyer p15
While a propeller is working astern, it will produce a transverse force of ____ to ____ % of applied stern power.
5 to 10 percent
Hooyer p15
