In December 1916, K3, with the future King George VI aboard, uncontrollably dived.

The ship plunged to 150 feet with the stern and propellers raised above the waves.

It took twenty minutes to free the ship from the sea bed mud and surface successfully.

K3 was involved in an accident with the 4th Light Cruiser Squadron, that led to the sinking of K1, in November 1917.

K3 was sold on 26 October 1921 to the Barking Ship Breaking Company for scrapping in London.