Marlinespike Seamanship Flashcards
Navy currently uses (4) main types of line:
- 3 strand (vang lines) - 4 strand (mooring lines) - Plated (hawsers) - Double - Braided
Four strand (aramid) lines are…
Right laid strands around a center core.
Double-Braided lines are…
Two hollow braided ropes, one inside the other.
For natural fiber lines the size is designated by…
Counting the number of threads.
Synthetic lines are designated by…
measuring the circumference
SMALL STUFF (definition)
Any line measuring 1 3/4 inches and smaller
SMALL STUFF (3)
-Size range from 6 thread to 24 thread for Manila lines -Marline- 2 strand, left laid, Tarred Hemp - May be used for: whipping, mousing, seizing
Small stuff whipping
Prevent the bitter end of a line from unlaying
Small stuff mousing
Line wrapped around a hook or object to prevent the load from falling off
Small stuff seizing
Used when two lines or 2 parts of a line are to be permanently married
Hawser (definition)
Any line measuring 5 inches and larger
Hawser may be used for (3)
Mooring, Towing and Amphibious Operations.
Lines are made of a variety of natural fibers such as: (4)
Cotton, Hemp, Abaca, Manila
Is the most common type of natural fiber line used in the Navy
Manila
Manila is superior to other natural fiber lines in terms of (4)
Strength, durability, ease of handling, resistance to weather
Manila line ___ years old, regardless of its condition, cannot be used in critical operations because the fiber deteriorated as it ages and therefore is not safe for use
5
A new coil of natural fiber line comes in a coil whose inside forms a tunnel, to uncoil the line…
Reach into the tunnel and draw the line through the top
Synthetic fibers currently in use for making lines are (5)
- Nylon - Aramid (Kevlar) - Polyester (Dacron) - Polypropylene - Polyethylene
Differences synthetic line v natural fiber line (4)
- Higher breaking strength - Poor knot holding characteristics - Is 1.7 to nearly 6 times as strong - Lasts 5 times longer
Will reach its Safe Working Load (SWL) when stretched to ___ of its length
3 Strand Nylon 30%
Will part when stretched to 30% if its original length
Double Braided Nylon
Are designed to fail sequentially. Meaning that one of the four strands will fail before the other strands.
Four strand plus core aramid lines
You uncoil synthetic fiber from the…
Outside. Don’t attempt to un oil synthetic line from the inside as with natural fiber.
Allow new synthetic line to relax for…
24 hours after being unreeled before putting it to use.