Seaway Endeavour in James Watt Dock, she was an acoustic research vessel of the Royal Maritime Auxiliary Service department of the Royal Navy, since November 2000 operated under contract by Serco Denholm, based at HMNB Clyde, Great Harbour, Greenock. Twelve scientists could be carried, and the ship was used in support of trials as well as supporting RN diving training.
The ship was named after Colonel James Templer, an early British military pioneer of balloons.
Built by Hall, Russell & Company in 1966 as a stern trawler then converted in 1980 for use by the Defence Evaluation and Research Agency, her displacement is 1,300 tonnes and dimensions 56 m by 11 m by 5.6 m. Her complement is 14 and speed 12 knots. After a serious fire gutted the ship in 1990 it had a major rebuild, and it was converted in 2001 to support diving training. By July 2011 she was on the sales list and sold to a Swedish firm and her name changed to 'Seaway Endeavour' with a blue and white livery for further future use as a research trials ship.