Sling. A rope with its ends short-spliced together used to lift cargo.
Slings. Chains or ropes by which a yard is suspended from a mast. 2. The middle part of a yard. 3. Chains or wires by which ships' boats are hoisted; specifically those attached to the boat.
Slip. Of propeller, is the difference between theoretical advance of ship by propeller action and the actual advance. Mainly due to propeller acting in a yielding medium. See 'Positive slip', 'Negative slip'.
Slip. Particulars of a maritime risk against which insurance is required. Made out by broker and offered to underwriters. When initialled by insurer it is treated as an acceptance of risk,