HMS Princess was launched in 1905 as Kronprincess Cecilie. She was detained 1 November 1914 and seized. She was renamed Princess in 1915 and converted to an Armed Merchant Cruiser on 9 January 1916. In this configuration, she was used as a dummy for the battleship HMS Ajax

HMS Ajax (1912)

HMS Ajax was a King George V-class battleship , built at Scotts' shipyard at Greenock on the River Clyde...

. All dummies were converted at Belfast by Harland and Wolff

Harland and Wolff

Harland and Wolff Heavy Industries is a Northern Irish heavy industrial company, specialising in shipbuilding and offshore construction, located in Belfast, Northern Ireland....

. All superstructure and guns were made of wood. The Princess/Ajax patrolled around Loch Ewe

Loch Ewe

Loch Ewe is a sea loch in the region of in the Northwest Highlands of Scotland. The shores are inhabited by a traditionally Gàidhlig speaking people living in or sustained by crofting villages, the most notable of which, situated on the north-eastern shore, is the Aultbea settlement...

.