Jærens rev

[3] The shoal is a partly stony sandbar and extends almost 2 nautical miles (3.7 km) to the west in front of the Revtangen headland, the westernmost point of Jæren.

It is very shallow: at Klausgrunnen, about 1.5 nautical miles (2.8 km) off the coast, the water depth is still only 3.5 metres (11 ft).

[4] A light buoy is located about 1.8 nautical miles (3.3 km) off the coast at the western end of the shoal,[5] approximately at position 58 ° 45 'N, 5 ° 26' E, for safe passage making.

A 16.5 metres (54 ft) high steel mark on Revtangen built in 2004 also serves as a navigational beacon; its top mark has a side length of 4 metres (13 ft).

[7] The Norwegian Air Force took possession of parts of the site in the 1950s as a target area for bombs and gunfire, and the ornithological station was therefore relocated in the autumn of 1954 about 1.5 kilometres (0.93 mi) further northeast, to a point near the Reve farms, where it is still located today.