A marine fish, Naucrates ductor, that often follows large vessels and sharks.

A pilot trained in using and assigned to pilot a fighter plane.

A proof of concept; an initial prototype.

A small-scale chemical engineering facility designed to research the full-scale production of a product.

Either of two species of whale in the genus Globicephala, dark grey in colour.

A pilot available for hire to fly, typically over short routes in light aircraft

(chiefly Canada, Australia, New Guinea) A pilot who flies small aircraft to and from remote locations, over expanses of relatively unpopulated territory.

plural of back-door pilot

(film, television) A film, miniseries, or episode that serves as a proof of concept for a new full television series, but may be broadcast on its own even if the full series does not come to fruition.

(US, military, aviation) An aircraft that may be manned or unmanned, able to function in either mode without modification.