[3] Much effort has been expended in making her quiet to reduce crew fatigue; the engines are raft-mounted, decks throughout the ship are of a floating type, and her compartments are constructed on a box-within-a-box principle.

The total installed power of 4,176 kW (5,600 hp)[3] giving a top speed of 26 knots (48 km/h).

[3] A single Promac bow thruster is installed[3] for slow speed manoeuvring in confined spaces.

[3] On 23 April 2015, together with the Royal Navy frigate Somerset, she intercepted the Tanzanian-registered tug Hamal in the North Sea, about 100 miles off Aberdeen, leading to the seizure of more than three tons of cocaine, believed to be the single largest seizure of a Class A drug in the UK.

[5] In June 2021, it was revealed that the Valiant had successfully requested permission to enter French waters to pick up migrants and take them to Britain.