SD Resourceful

 Passing Gourock for Faslane.

SD Impetus

 Submarine tug passing Greenock.

SD Northern River

 SD Northern River is a  multi-purpose auxiliary ship operated by Serco Marine Services in support of the United Kingdom's Naval Service and is currently the largest ship operated by Serco Marine Services, both in terms of dimensions and gross tonnage.

She is seen here at James Watt Dock undergoing maintenance work.

SD Oronsay

 SD Oronsay passing Gourock on her way back to Faslane Naval Base.

SD Victoria

 SD Victoria is a  support ship operated by Serco Marine Services in support of the United Kingdom's Naval Service.

SD Impulse

 SD Impuse,tug used for submarines seen here at the entrance to Loch Long.

SD Oronsay

 SD Oronsay [Naval Auxiliary] at Ardrossan Harbour.

SD KYLE OF LOCHALSH

 SD Kyle of Lochalsh in James Watt dock Greenock.

SD Omagh

 SD Omagh in Garvell Dry Dock

SD Tornado

SD Tornado seen at James Watt Dock in 2008.

A140 Tornado built 1979 by Russell Hall ,one of 4 Tornado class torpedo retrievers. Displacement: 698 tons full load; Dimensions: 156 x 28 x 10 feet

Propulsion: 2 diesels, 2 shafts, 2,200 bhp, 14 knots Crew: 14 

She is now known as LEV Tornado and operates as a salvage and rescue vessel in Germany.

SD Husky

 Former MOD Harbour Tug SD HUSKY, built in 1969 by Babcock Marine at Appledore UK.

Retired from MoD Service being bought by Akoto Ventures at Lagos Nigeria in Sept 2011

SD Impulse

 Military Tug SD Impulse heading back to Faslane.

SD Impulse

 SD Impulse a military tug passing Loch Long after escorting a submarine into the Firth.

SD Moorfowl

SD MOORFOWL, described as a 'Powered Mooring Lighter', was built in 1989 by McTay Marine at Bromborough,seen here departing James Watt Dock after her winter refit.