A gig is a type of boat. It was optimised for speed under oar, but usually also fitted with a sailing rig for appropriate conditions. The type was in use by Deal boatmen in the 18th century. It first occurred as a naval ship's boat after Deal boatbuilders recommended a different design to boats ordered from them by the Royal Navy to equip the cutters purchased in the 1760s to combat smuggling. The captains of larger warships soon sought permission to substitute a gig for one of the heavier boats which were then used; some even had a gig built at their own expense. The gig therefore became part of the usual complement of ship's boats used in warships.

A ship's boat is a utility boat carried by a larger vessel. Ship's boats have always provided transport between the shore and other ships. Other work done by such boats has varied over time, as technology has changed. In the age of sail, especially for warships, an important role was the collection of drinking water. The use of radio, followed by telex, e-mail, etc. has reduced and then replaced the need for written communications to be delivered. A large enough boat may be needed to carry an anchor to some distance away from the ship, so as to kedge out of a harbour or away from a hazard – and also to recover such an anchor afterwards. Warships have always used their boats as an extension to their military role. This includes the provision of a means of escape for the crews of fireships, the landing of troops, or the "cutting out" raids that were used by the Royal Navy, especially during the Napoleonic Wars. All these requirements competed with the need to be able to stow the boats on board in a way that did not interfere with the normal operation of the ship.