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Although the traditional boat hook is still available, various different materials, such as aluminium and even a rolled up polymer are now available. [3] Although the boat hook is a general purpose reaching and holding-off tool on boats, there are more specialised forms, such as the Recovery Pole [4] designed for length rather than the rigid strength of a boat hook.
This kind of block makes a loaded line easier to hold by hand, and is sometimes used on smaller boats for lines like main and jib sheets that are frequently adjusted. A single, large, sail-powered warship in the mid-19th century required more than 1,400 blocks of various kinds.
A hook is a hand tool used for securing and moving loads. It consists of a round wooden handle with a strong metal hook about 20 cm (8 inches) long projecting at a right angle from the center of the handle. The appliance is held in a closed fist with the hook projecting between two fingers.
A pelican hook is a piece of nautical rigging hardware It is composed of a hinged link held closed by a circumferential link capable of being released under load. Small examples are held closed by hand while the retaining link is displaced while larger examples are hit with a hammer or sledge hammer [ 1 ] [ 2 ] to release.
Ancient Japanese iron kaginawa climbing hook A chain grapnel – used to recover a cable from the seabed. A grappling hook or grapnel is a device that typically has multiple hooks (known as claws or flukes) attached to a rope or cable; it is thrown, dropped, sunk, projected, or fastened directly by hand to where at least one hook may catch and hold on to objects.
Hooks of 2.00 mm or larger diameter are called yarn hooks or regular hooks. Aluminum is the predominant material from 2.0 mm to 6.0 mm (for its lighter weight). Beyond that, bamboo, wood, and plastic are the more common materials (for their even lighter weight). The indicated size boundaries between the types are, however, approximate.