On sailboats and sailing ships, once a rope has a purpose or a taskm it is nearly always referred to as a line, not a rope. There can be 5-15 ropes on a typical sailing ship, The common ones you can find on a sailboat include -
Bell rope (to ring the bell)
Tiller rope (to hold the tiller)
Leech rope (a part of the sail)
Luff rope (a part of the sail)
Bolt rope (a part of the sail)
Rope (a new line that has no purpose or place, most likely stored below deck)
Though many have individual names here are some overall names for ropes;RopesStaysLinesSheetsHalyardsEnds
This is an old sailing term. If you knew your ropes, you knew which rope on a sailing ship would do which task, and you were a good and experienced sailor. Nowadays, you say that any experienced person "knows the ropes."
in a sailing dinghy, the name given to ropes used for hoisting the sail is halyards.
craft?
It refers to being a seasoned sailor and knowing all the ropes on a sailing ship. The person knows where things are and how they work.
"Unsinkable" is a contradiction of terms, as the "Titanic" proved.
The expression is actually to 'know the ropes'; it means to understand how to do something, especially in terms of one's job.As to where the expression came from, two similar theories involve sailing and the theater, both of which were occupations where knowledge of ropes and knot-tying were critical.
Dead reckoning is a method of estimating the position of an air craft or ship.
A ketch is a type of sailing craft.
There are four support ropes attached to the pulley in the image.
Ships of that time period required people manning the rigging, the sails, and working with huge ropes. It was a job that was day and night.
Modern day sailing is recreational, and harnessing the power of the wind to accelerate and direct a craft in almost any direction can be stimulating and enjoyable (unless you are in Jaws 2, then it is not so much fun).