Coastal Forces of the Royal Navy

Coastal Forces was a division of the Royal Navy initially established during World War I, and then again in World War II under the command of Rear-Admiral, Coastal Forces. It remained active until the last minesweepers to wear the "HM Coastal Forces" cap tally were taken out of reserve in 1968.

Source: Wikipedia — Coastal Forces of the Royal Navy (CC BY-SA 4.0)