The UK Royal Navy’s Duke-class Type 23 frigate, HMS St Albans, has successfully tested its firepower at a range off the coast of Norway.
During testing involving the Royal Navy, British Army and Norwegian commandos, the warship fired 160 rounds of explosive on to an island range.
HMS St Albans' main 4.5in Mod 1 gun, called Kryten, fired 88lb of steel during day and night, as part of testing.
Petty Officer Lisa Lee said: "This exercise was the most stressful test the gun has had to date and it performed really well.
"It was particularly challenging but we pulled together and some day troops on the ground may have to rely on it."
Commissioned in 2002, the 133m-long, 4,900t Portsmouth-based frigate can accommodate a 180-member crew, while offering an operational range of 7,800nm and a maximum cruising speed of 28k.
Equipped with the vertical-launched Seawolf point missile defence system and the Boeing Harpoon surface-to-surface missile, the warship is capable of conducting anti-surface warfare (ASuW).
In August 2014, HMS St Albans was re-commissioned following successful sea trials off the south coast in May, marking the completion of a £25m refurbishment programme.
As part of the revamp programme, BAE Systems carried out upgrades on the frigate's weapon systems, command and control computer systems and information processes, as well as an overhaul of its main propulsion systems.
The frigate has served the Royal Navy for more than 40 years.
Image: HMS St Albans' main 4.5in Mod 1 gun, called Kryten, fired 88lb of steel during day and night. Photo: courtesy of Royal Navy.