This series contains original drawings relating to Queensland lighthouses. Within the series are drawings of beacons, buildings, buoys, circuit diagrams, communications equipment, cylinder arrangements, generators, lanterns, lightning conductors, light-vessels, optical apparatus, sectors, site plans and towers.
The drawings that vary in size are mainly pen and ink with some pencil and a few watercolours.
The drawings are controlled by a two number (the primary number indicates the type of drawing and the secondary number is the drawing number eg QN-01-001, the 01 being a tower drawing and the 001 the drawing number) with 'QN' (Queensland Navaids) prefix. Drawings drawn prior to 1979 were top numbered from J2775 and given a new control number.