Navigational aid
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A navigational aid, also known as aid to navigation, is any sort of signal, markers or guidance equipment which aids the traveller in navigation, usually nautical or aviation travel. Common types of s
The entrance to the inner harbour of the Port of Fremantle, Australia, with a yellow special mark at left, a region A red port lateral mark at right, and a region A green starboard lighthouse in the background
Region B green port lateral marks (with Galápagos sea lions (Zalophus wollebaeki)) in the Galápagos Islands
IALA-B starboard hand bifurcation buoy
Triangle shaped lead marks with lights.
Light characteristic
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A light characteristic is all of the properties that make a particular navigational light identifiable. Graphical and textual descriptions of navigational light sequences and colours are displayed on
Symbols and abbreviations for light characteristics
Clockwork occulting mechanism formerly in use at Coquet Island Lighthouse
Brier Island Lighthouse cropped