In February 1917, Duncan returned to the United Kingdom and paid off at Sheerness to provide crews for antisubmarine vessels.

In the following days, Tilefish claimed two more kills-a cargo ship and a wooden-hulled antisubmarine vessel.

Albemarle returned to the United Kingdom in September 1916, paying off at Portsmouth to provide crews for antisubmarine vessels.

Despite thorough coverage of the waters assigned her, she made few contacts and each of these was a small antisubmarine vessel.

"All antisubmarine vessels have closed the beach," Thornback's commander later recorded, "and seem to be pinging away at the rocks."

She arrived at Devonport in August 1917, and paid off to provide crews for antisubmarine vessels.

The British even exploited German chivalry by building Q-ships, antisubmarine vessels disguised as innocent merchant ships.

Canopus arrived at Plymouth on 22 April 1916, then paid off at Chatham to provide crews for antisubmarine vessels.

Appraised of the need for antisubmarine vessels to combat the U-boat menace, Ford replied, "what we want is one type of ship in large numbers."

Albatros was the first project to create a specialised antisubmarine vessel.