Ch. 6

Question 1

T or F Undocking is, by its very nature, a simple maneuver that requires less planning than docking

Answer 1

False

Question 2

T or F In a ballasted condition, it’s usually better to have too much drag than not enough, if such trim is necessary to get the propeller and rudder well submerged.

Answer 2

True

Question 3

T or F It is best to approach a potential hazard such as a pier or shoal stern first because you can always put the engine ahead to reduce sternway.

Answer 3

False

Question 4

You are about to undock a ship berthed port side to at a wharf. Ships are berthed close ahead and astern, so the ship must be moed laterally to starboard, away from the berth, to clear those ships. Only one tug is available. Describe one way to accomplish this.

Answer 4

The tug backs at a 45 degree angle toward the stern, while the ship’s engine turns ahead and her rudder is put hard to port.

Question 5

Your ship is berthed starboard side to. A tug is made fast on the port bow and the last line has been let go. The ship has a right-hand turning propeller. There is no ship berthed astern. The ship’s engine is put astern.

Answer 5

• The stern will move away from the berth unless there is a strong current or wind countering the propellers effect
• The bow moves toward the berth as the ships speed increases
• The tug will back to steady the ship as she moves astern out of the berth

Question 6

Your ship is berthed port side to her berth. One tug is available and is made up on the starboard bow. There is no ship berthed astern, but you will need to back approximately 300 feet to get clear of the ship. Describe one way to do this job.

Answer 6

• The tug comes ahead
• This moves the ships bow toward the berth
• The tug continues pushing until it is at a significant angle to the pier
• This is necessary because the stern will move toward the pier when the engine goes astern and the ship backs from the berth.

Question 7

A ships bow can be moved or canted toward a pier before undocking by

Answer 7

• pushing with a bow tug
• Heaving on the headline while holding the forward spring
• Backing a stern tug
• Coming ahead dead slow against the spring line with the rudder hard over toward the dock

Question 8

Face ______ when moving a ship stern first.

Answer 8

astern

Question 9

When turning in a tidal basin its usually best to

Answer 9

• Turn the ship in the up current side of the basin to avoid being set out of the basin before completing the maneuver
• have as much way off the ship as possible before starting to turn in a basin

Question 10

Ships fitted with variable-pitch propellers respond in a ___________ manner than ships fitted with conventional propellers when the engine goes astern.

Answer 10

less predictable

Question 11

Variable pitch ships should be fitted with ______ propellers

Answer 11

left handed propellers so they back like a conventional right handed propeller.

Question 12

T or F Always dismiss the forward tug as soon as possible to reduce tug charges.

Answer 12

false