This fjord was named in 1829 by Lieutenant W. A. Graah after Danish Admiral Christen Thomesen Sehested.

To the east it opens into the North Atlantic Ocean with Uiivaq and the entrance of Kattertooq Fjord on the northern side of its mouth and Griffenfeld Island on the southern side.

The Rimfaxe, Guldfaxe and Ygdrasil glaciers have their confluence shortly before their terminus at the northwestern end of the fjord.

1,539 m (5,049 ft) high Peberbøssen, a prominent peak, rises on the King Dan Peninsula (Kong Dan Halvø) on the northern side near the entrance.

The Skirnir Mountains (Skirners Bjerge) are a nunatak group rising at 63°2′N 42°40′W / 63.033°N 42.667°W / 63.033; -42.667 between the Heimdal and Garm glaciers in the inner part of the fjord.