Marlinspike Seamanship and Knots Flashcards

A 'figure-eight knot' is used as a stopper knot primarily to:

Answer: Prevent a line from running through a block or fairlead

The figure-eight knot creates a bulky stopper at the end of a line that prevents it from passing through a block, eye, or similar fitting.

What is 'parceling' in the rope-maintenance process?

Answer: Wrapping tarred canvas spirally along the rope

Parceling is the second step—wrapping the rope with strips of tarred canvas (with the lay) to keep moisture out after worming.

When securing a line to a ring using a half hitch, how many half hitches provide a secure hold?

Answer: Two half hitches

Two half hitches form a reliable hitch around a ring or rail and are a standard seamanship fastening.

Nylon rope is preferred for anchor rodes and tow lines primarily because of its:

Answer: High elasticity that absorbs shock loads

Nylon stretches significantly under load, acting as a shock absorber that reduces peak stress on deck fittings and anchors.

Which knot is known as the 'king of knots' for forming a secure, non-slipping loop at the end of a line?

Answer: Bowline

The bowline creates a fixed loop that will not slip or jam and can be untied easily, making it one of the most important knots in seamanship.

A 'thimble' is inserted in an eye splice to:

Answer: Protect the line from chafe where a shackle or hook bears on it

A thimble—a grooved metal or plastic insert—prevents the sharp radius of a hook or shackle from cutting into the rope fibers.

What is the 'safe working load' (SWL) of a line in relation to its breaking strength?

Answer: A fraction of breaking strength reduced by a safety factor

SWL is the breaking strength divided by a safety factor (typically 5:1 for fiber rope), giving the maximum recommended working load.