HDMS Sehested (P 547) is a Willemoes-class fast attack craft of the Royal Danish Navy which was in commission from 1978 until 2000.

The ship is named after Christen Thomesen Sehested, a Danish vice-admiral during the Great Northern War (1709-1721).

The Willemoes were a Danish-manufactured class of fast attack craft built for the naval defence of Denmark during the Cold War.

The ship also carried sixteen mines, two Stinger surface-to-air missiles and Seagnat chaff launchers.

In 2000, Rodsten won the Cannonball pennant, during the race from Kiel to Korsør Naval Base, with Sehested, thus being the last holder of the champion title.