Pivot point and effect of wind

Question 1

Where is the pivot point of vessel stopped on the water ( no wind or tide)

Answer 1

At the centre of gravity

Question 2

What two forces do you have to consider when a vessel starts to make headway?

Answer 2

• Forward momentum of the vessel
• Longitudinal resistance of the water

Question 3

Where does the pivot point of a vessel move to when it starts to make headway? (2)

Answer 3

• Initially, to the bow of the vessel
• Then, as forward momentum=water resistance, P moves to 1/8 boat length from forward

Question 4

Where is the pivot point of a vessel making headway with constant speed (no tide or wind considered)?

Answer 4

Around 1/4 boat length from forward

Question 5

What two forces need to be considered when a vessel is starting to make sternway?

Answer 5

• Astern momentum of the vessel
• Longitudinal resistance of the water

Question 6

Where does the pivot point move to when a vessel starts to make sternway (2)?

Answer 6

• Initially, to the aft of the vessel
• Then, when astern momentum=water resistance, pivot point moves 1/8 boat length from aft

Question 7

Where is the pivot point of a vessel when they are moving at constant speed astern?

Answer 7

1/4 boat length from aft