Ardtaraig House, located at the head of Loch Striven, and similarly requisitioned by the Admiralty, became a secondary naval base for the 12th Submarine Flotilla midget submarines and became known as HMS Varbel II.
The house at Ardtaraig, located on Loch Striven, was taken over by the Admiralty and used as a secondary naval base for the 12th Submarine Flotilla's small submarines, which were named HMS Varbel II.