Post war group. Mobile Reserve Tankers. Chartered for Beira Patrol.

RFA Derwentdale(2). Built 1965 (Halcyon Breeze 67729dwt. 1967-1974. RFA Dewdale(2). 60600dwt. Built 1965 (Edenfield). 1967-1977. RFA Ennerdale(2). 47470dwt. Built 1963 (Naess Scotsman). 1967-1970 (foundered).
Length overall: 799ft 774ft 710ft. Beam: 118ft 108ft 99ft. Draught: 42ft 6in 41ft 5in 37ft 6in. Depth 55ft 55ft 52ft
Machinery: Derwentdale 9-cylinder Hitachi/B&W diesel, 20,700bhp, single shaft Dewdale 9-cylinder H&W/B&W diesel, 17,000bhp, single shaft Ennerdale 8-cylinder Krupp/B&W diesel, 16,800bhp, single shaft
Speed: 15.5 knots 15 knots 15.5 knots
Complement: 56 51 51