Marine navigation

alt=Planispheric Astrolabe made of brass, cast, with fretwork rete and surface engraving|thumb|upright=1.2|North African, planispheric astrolabe. Khalili Collections|Khalili Collection. thumb|upright|A modern astrolabe made in 2013, in Tabriz, Iran.

thumb|Smart buoy with solar panels, [[LED light, and corner reflectors for radar]]

navigation instrument

instrument used to measure the speed of a ship at sea

direction or route along which an object travels

sea mark indicating where safe water is near to a hazard

sea mark used in maritime pilotage to indicate the edge of a channel

details of routes for coastal navigation

thumb|World War II Astrocompass dials and adjustments An astrocompass is a navigational tool for determining the direction of true north through the positions of various astronomical bodies. It is an evolution of earlier solar compass designs.

buoy type