Manoeuvre of the ship

Question 1

Where is the Pivot point of the vessel? 3 stages?

Answer 1

Stationary, generally amidships

Kicking ahead, Right forward

Underway, Generally 1/3 or 25% from forward

AFT is the opposite when going astern

Question 2

What is transverse thrust?

Answer 2

Transverse movement created by the direction of the propellor in a single screw vessel

Question 3

Where do we find info on vessels tendency to squat?

Answer 3

Manoeuvre card posted in the bridge
and manoeuvre booklet

Question 4

Explain bank effect (bow cushion effect)

Answer 4

Close to a bank, Pressure of bow wave will send bow away

Low pressure at the stern will attract the stern towards the bank

Question 5

Modes of steering on board

Answer 5

Hand steering, FU and NFU
Automatic pilot, track control and heading mode
ME’s
Thrusters
Emergency steering

Question 6

Difference between FU and NFU steering

Answer 6

FU steering, the rudder will follow the command at the helm. 10Degrees to port will send the rudder to 10Degrees to port, and so forth

NFU steering, the rudder will move to port or stbd so long as the lever is held down. Once the lever is released, it will spring back to centre, and the rudder will remain at the angle achieved until counter helm is applied

Question 7

Track control

Answer 7

Needs ECDIS input and GPS input to follow a pre laid track on ECDIS

Question 8

Heading mode

Answer 8

Needs a Gyro to follow a predetermined heading

Question 9

What affects stopping distance?

Answer 9

Vessel Shape beneath the waterline, presence of a bulb
Running gear
ME’s power
Speed
Interaction/squat
Current and sea state

Question 10

What affects the turning circle?

Answer 10

Current and sea state
Speed moving ahead
Type of steering/running gear
Type of Rudder
Length of vessel/shape beneath the waterline