What is Cruise?

Legal Definition
Mar. law. A voyage or expedition in quest of vessels or fleets of the enemy which may be expected to sail through any particular track of the sea, at a certain season of the year the region in which these cruises are performed is usually termed the rendezvous or cruising latitude.

2. When the ships employed for this purpose, which are accordingly called cruisers, have arrived at the destined station, they traverse the sea, backwards and forwards, under an easy sail, and within a limited space, conjectured to be in the track of their expected adversaries. Wesk. Ins. h. t.; Lex Merc. Rediv. 271, 284; Dougl. 11. 509; Park. Ins. 58; Marsh. Ins. 196, 199, 520; 2 Gallis. 268.
-- Bouviers Law Dictionary
Legal Definition
A voyage undertaken for a given purpose; a voyage for the purpose of making captures jure belli. The Brutus, 2 Gall. 538, Fed. Cas. No. 2,060. A voyage or expedition in quest of vessels or fleets of the enemy which may be expected to sail in any particular track at a certain season of the year. The region in which these cruises are performed is usually termed the "rendezvous, or "cruising latitude." Bouvier. Imports a definite place, as well as time of commencement and termination, unless such construction is repelled by the context. When not otherwise specially agreed, a cruise begins and ends in the country to which a ship belongs, and from which she derives her commission. The Brutus, 2 Gall. 526, Fed. Cas. No. 2,060.
-- Black's Law Dictionary