What are the 4 forces affecting docking? - Answer-1. Prop Wash
2. Prop Wash
3. Wind
4. Current
How does Prop Walk affect boat speed and orientation? - Answer-In reverse gear Prop Walk moves the stern to the LEFT (for right handed propeller). More speed reverse, more the stern turns left.
H...
Docking Clinic ASA 118 Exam Questions
and Answers
What are the 4 forces affecting docking? - Answer-1. Prop Wash
2. Prop Wash
3. Wind
4. Current
How does Prop Walk affect boat speed and orientation? - Answer-In reverse gear Prop
Walk moves the stern to the LEFT (for right handed propeller). More speed reverse,
more the stern turns left.
How does Wind affect boat speed and orientation? - Answer-In a cross wind the bow
turns downwind faster then the stern. Cross wind blows bow downwind.
How does Current affect boat speed and orientation? - Answer-Cross current sets
ENTIRE boat down current.
Backing out of slip what to consider? - Answer-Wind direction
Considerations and Procedure Backing out of slip with wind from ahead and cross?
(Blowing straight out of slip or cross wind) - Answer-- Consider that wind threatens to
blow bow into piling as you turn while backing out
- Use a doubled over midship spring line on the lee side to turn/pivot the boat while
backing out
- or alternatively use a doubled-over bow line windwards to control the bow
Consideration and Procedure Backing out of slip with wind from astern and cross?
(Wind blows into the slip) - Answer-- This is called turning to windward: consider that
cross wind blowing into the fairway or wind blow into the slip may may prevent boat
while turning to clear the end piling
- back away as far as possible before going into forward gear
Heading bow first out of a slip with wind from across - wind blowing against intended
exit direction- heading out with opposing wind? - Answer-Consider: Turning into fairway
will be harder. Wind pushes bow against opposite docks.
Use a midship spring line windward to help turn the boat sooner (pivot) to avoid striking
the slips across the fairway.
Parallel undocking when easy and when harder? - Answer-Windward dock easy, lee
dock hard. Also, boats in front or aft can make it harder.
, Parallel docking departure with wind blowing away from the dock - procedure? -
Answer-Release lines and let wind blow you away from dock while gently engage and
disengage engine
Parallel docking departure from lee, wind blowing onto the dock-procedure? - Answer--
Stern out preferable over bow out
- Springing stern off dock by turning rudder slightly towards dock (prop wash helps) and
power stern away while using doubled over spring line at the bow and a handheld
fender at the bow
- Springing bow off dock by powering (forward) away from the dock in reverse gear
while doubled over spring line at the stern pivots boat. Use a manual fender stern to
protect boat. Rudder is ineffective here. When boat turned away from dock, then turn
rudder away from dock and power forward.
Backing into slip-Port side approach- What is easier? - Answer-It is easier to approach
the slip to your left, port side approach since you can do right side standing turn to the
right to align stern with slip.
Backing into slip-Port side approach, no wind: what to prep? - Answer-2 bow lines, 1
forward spring line, 2 stern lines
Tie bow line loops on shore ends on all of them
Bitter ends cleated to cleats stern and bow end. Loops under lifeline and above back
into boat ready to go bow lines and spring line loosely coiled with loop on top.
Fenders tied to stanchions
Approach port side to dock (escape possible with right standing turn around)
Slow speed. Come to a complete stop when 90 degree before slip, before short kick
with right rudder making the boat turn approx 45 degrees to the slip, then short kick
reverse to slow forward momentum(dont't change rudder) then slow reverse to line up
stern with slip entrance
Have 2 crew handling the bow lines and forward spring line while you back into the slip,
they loop this 3 lines over the outer slip piling on each side as the stern reaches the
piling, and then walk the lines forward as the boat backs deeper into the slip. The bow
lines are used to center the boat and the forward spring line keep the stern from hitting
the dock and gets eventually fastende to midship cleat
Last priority at the end fasten the 2 stern lines
Backing into slip-Port side approach, wind in fairway from ahead: considerations? -
Answer-Travel a little past the slip before making the initial turn to compensate for wind
effect
Turn can be less then 45 degree since the wind from ahead will help turn the bow
When backing into slip wind becomes a cross wind and can blow bow fast out of
alignment. Use windward spring line (midship cleat as pivot) with outer piling and help
pivot boat around
Backing into slip-Port side approach, wind from astern into fairway: considerations? -
Answer-Make the initial turn BEFORE you reach the slip and turn much more - 135
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