HNoMS Tyr was a Gor-class Rendel gunboat built for the Royal Norwegian Navy at Karljohansverns Verft Naval Yard in Horten.

After the war she was returned briefly to the Royal Norwegian Navy then entered civilian service in a number of roles over the years.

However by the time the supply fleet of the German forces in the Bergen area started coming into Lerøyosen late in the evening the mines were ready.

In an improvised reaction to the mines the invaders sent out the naval trawlers Schiff 9 and Cremon,[10] together with two launches from the depot ship Karl Peters.

[12] After laying her mines Tyr resumed guarding the southern sea lane to Bergen and soon met up with German naval forces.

From her anchorage south of Uskedal Tyr first damaged an E-boat and then, with her 12 cm main gun, put a large hole below the waterline of the armed trawler Schiff 18 forcing her to be beached to avoid sinking.

All the while during the battle Tyr was providing naval gunfire support from her position in the Storsund midway between Uskedal and Herøysund, bombarding the Germans with high explosive shells.

As Sub-Lieutenant Sandnæs now considered the battle as hopeless he ordered his crew ashore to rest, also sending small arms and ammunition on land.

Sandnæs started preparations to scuttle his ship with explosives, but before he could carry out his intentions two E-boats entered the bay and boarded Tyr.

In German hands Tyr was first used together with fellow captured Norwegian minelayer Uller in a plan by Admiral Otto von Schrader to mine the entrance to the Sognefjord on 30 April.

Before the two minelayers even had entered Sognefjord they were attacked by two of the Royal Norwegian Navy Air Service's M.F.11 biplane patrol aircraft.

Before the minelayer got back to base she was ambushed in the Fålefotsundet narrows between Hisøya and the mainland by the crew of a Norwegian guard boat that had been stalking her since leaving the Sognefjord.

The fire fight continued until Tyr had passed through the narrows and got out of range of the Norwegians' light weaponry, making it back to Bergen.

Later she was sold to a salmon farm company and as of 2006 was still in existence as a floating storage vessel, at last report entering Eidsvik shipyard in May 2014 for restoration.