SD Dependable

SD Dependable and Resourceful at the Tail of the Bank awaiting the arrival of a Royal Navy ship to be escorted into Faslane.

SD Reliable

SD Reliable passing Greenock Ocean Terminal,

SD Oransay

Heading for the Great harbour Greenock.

SD Impetus and SD Resourceful

SD Nothern River

Sd Nothern river at the entrance to the Holy Loch

Sd Northern River

 SD Northern River is a large 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.

Her duties involve target towing during naval training exercises, noise ranging and data gathering, as well as serving as a submarine escort.

SD Omagh

SD Omagh personnel carrier for the royal Navy.

SD Impulse

Tug that works with the British navy,based at Faslane.

SD Impetus

SD Impetus military tug heading down the Gareloch.

SD Reliable

SD Reliable a harbour tug working with an American warship at Faslane.

Tugs work boats on the Clyde

SD Northern River

SD Northern River heading for the Great Harbour Greenock.

SD Dependable

SD Dependable a navy tug leaves Loch long and passes Kilcreggan on her way back to Faslane naval base.