Beautemps-Beaupré, while surveying the coasts with Lieutenant Crétin, discovered that Adventure Bay, Tasmania, which had been discovered by Tobias Furneaux and named after his ship in 1773, was on an island which was separated from the mainland by a fine navigable channel. On 16 May, d'Entrecasteaux commenced to sail the ships through the channel, and this was accomplished by the 28th. Port Esperance, the Huon River, and other features were discovered, named, and charted, the admiral's names being given to the channel (D'Entrecasteaux Channel) and the large island (Bruny Island) separated by it from the mainland.