Douglas Lamp (G.B.)
Alternative term: Douglas Burner (G.B.)
A form of oil lamp burning paraffin as fuel. A parabolic metal reflector with focus at the centre of the flame is provided as an integral part of the lamp.
The paraffin storage tank is housed behind the reflector.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
centre of gravity
Centre of buoyancy
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM