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2. Hydraulic jigger - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_jigger

   [ii] The other side was filled with hydraulic fluid. When the launch valve was triggered, the hydraulic fluid pressure dropped rapidly as fluid was vented into an unpressurised catch tank. The piston was forced rapidly from the air end to the hydraulic end, pulling the crosshead and the jigger pulleys and drawing the launch trolley forwards.

3. Come-along - Wikipedia

   en.wikipedia.org/wiki/Come-along

   A come-along. A come-along, also known as a power puller, is a hand-operated winch with a ratchet used to pull objects. The drum is wrapped with wire rope.A similar tool that uses a nylon strap is used to straighten trees, as it straightens gradually over time, therefore not splitting the trunk.

4. Active heave compensation - Wikipedia

   en.wikipedia.org/wiki/Active_heave_compensation

   [4] [5] Hydraulic "active boost" winches control the oil flow from the pump(s) to the winch so that the target position is reached. Hydraulic winch systems can use accumulators and passive heave compensation to form a semi-active system with both an active and a passive component. In such systems the active part will take over when the passive ...

5. Anchor windlass - Wikipedia

   en.wikipedia.org/wiki/Anchor_windlass

   The combined port anchor windlass and winch of the modern ferry Stena Britannica. The hydraulically operated brake and pawl allows the anchor to be dropped from the ship's bridge. [citation needed] A windlass is a machine used on ships that is used to let-out and heave-up equipment such as a ship's anchor or a fishing trawl. On some ships, it ...

6. Level luffing crane - Wikipedia

   en.wikipedia.org/wiki/Level_luffing_crane

   The crane's hook is kept level by automatically paying out enough extra cable to compensate for this. This is also a purely mechanical linkage, arranged by the reeving of the hoist cables to the jib over a number of pulleys at the crane's apex above the cab, so that luffing the jib upwards allows more free cable and lowers the hook to compensate.

7. Winch - Wikipedia

   en.wikipedia.org/wiki/Winch

   An air winch, sometimes known as an air hoist or air tugger, is an air-powered version of a winch. It is commonly used for the lifting and the suspension of materials. In the oil and gas, construction , and maritime industries, air winches are frequently preferred to electric, diesel, and hydraulic winches because of their durability ...