Design and Development
The original intent of the Bangor-class minesweeper design was to provide a coastal equivalent of the Halcyon-class minesweeper, however the realities brought to light by the start of the war caused a modification of the design before construction started.
The need for quick construction coupled with the limitations of engineering resources resulted in several variations existing based on the availability of propulsion machinery. They all had twin screws, but the machinery was a mix of steam turbine, slow-speed steam reciprocating, high-speed steam reciprocating and diesel. The diesel powered examples were about 20 feet (6 m) shorter than the rest as they had no need for boiler rooms. Displacement varied with propulsion machinery from 590 to 672 tons. The reciprocating engine powered Bangors were also known as the Blyth class and the steam turbine powered versions as the Ardrossan class.
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