Shiphandling

Question 1

What is ship handling?

Answer 1

Control and balance of forces to safely manoeuvre vessel, accounting for the unique properties of the vessel

Question 2

What are the controllable forces in Ship handling?

Answer 2

Engines and Propellors
Rudders
Thrusters
Tugs
Anchors
Mooring lines

Question 3

What are the uncontrollable forces in Shiphandling?

Answer 3

Wind
Current

Question 4

What other forces do you have to consider in Shiphandling, outside of the controllable and uncontrollable?

Answer 4

• Shallow Water Effect
• Vessel interaction

Question 5

What is transverse thrust?

Answer 5

Where a fixed pitch propeller has the tendency to bring the stern in the direction of the turn of the propeller.

Eg a left hand prop will bring the stern to port going ahead and cant the bow to starboard

Question 6

Right Hand Fixed Pitch - transverse thrust when going ahead?

Answer 6

Stern to starboard
Bow to port

Question 7

Right hand fixed pitch - transverse thrust when going astern?

Answer 7

Stern to port
Bow to starboard

Question 8

Left hand fixed pitch - transverse thrust when going astern?

Answer 8

Stern to starboard
Bow to port

Question 9

Left hand fixed pitch - transverse thrust when going ahead?

Answer 9

Stern to port
Bow to starboard

Question 10

Relationship between Speed through Water (STW) and rudder efficiency?

Answer 10

More STW = more water flow over rudder therefore better efficient

However, low STW and a strong adverse current may also be effective

Question 11

Turning short round RHFP

Answer 11

1. Start on port side of channel or seaway
2. Rudder hard to stand
3. Kick full ahead (to limit headway)
4. Rudder midships
5. Engines astern
6. Commencing sternway, bow will cant to stbd, Stern to port. Stop engines.
7. Rudder stbd, engines ahead