Bligh's second expedition was authorised by the admiralty in March, 1791, and the commander was consulted as to "what sort of vessel may be best adapted to the object in view." The Providence, a 28-gun ship, was chosen, with the brig Assistant as a tender. The latter was placed in charge of Lieutenant Nathaniel Portlock. Flinders, eager for sea experience, joined the Providence as a midshipman on May 8th, and thus had the advantage of being under the immediate direction of her captain.