Home | Marine Aids to Navigation | Onshore Beacons and Towers ALT 5 Onshore Beacons Main Beacons Usual Application 6 mMax. Height 1,0 m Nominal Width The ALT 5 onshore beacons are marine aids to navigation with a double function: to act as a day mark and also as a support of a marine lantern. They can be used with all of our lighting equipment and power systems, autonomous or connected to the grid. Manufactured in hot dip galvanized steel, their heights are from 3 to 6 metres, with a diameter of 1000 mm. They are used for long range beacons between 3 and 7 NM. Request moreinformation about ALT 5 Onshore Beacons