[3] The destroyer was armed with three quick-firing (QF) 4-inch (102 mm)/45 calibre Mark IV guns in single mounts.

For secondary armament, the destroyer was equipped with a single QF 2-pounder "pom-pom" Mk.II and four 21-inch (533 mm) torpedo tubes in two twin mounts.

[4] As a Thornycroft "special", Patrician resembled the standard Admiralty version of the class with the exception of her flat-sided funnels and higher freeboard.

They needed one additional electrical engine for manoeuvering in harbour, an oil fuel galley to avoid storing coal for cooking and an enclosed bridge for service in the northern Atlantic Ocean.

[13] The arrival of the three new ships, the two destroyers and the light cruiser HMS Aurora, caused the first installation of oil fuel tanks in Halifax and Victoria harbours.

On 21 January 1921, the three ships departed for a cruise carrying secret documents from the Admiralty to British consulates throughout Central and North America.

While on the cruise, the squadron was ordered to Puntarenas, Costa Rica, where their presence was used to strengthen the Canadian government position in negotiations over oil concessions.

[15] Following the cruise, Patrician was ordered to the west coast of Canada in 1922, where she was used primarily as a training ship, though did perform some fisheries patrols.