HMS Raider is in Maryport this weekend.
The visit by the Royal Navy Archer class patrol vessel is part of the Armed Forces Day celebrations in the town.
It was in Whitehaven yesterday and arrived in Maryport yesterday morning.
The vessel will be open for visits today, Sunday June 28, between 11am and 3pm.
Visitors must be able to climb a short set of ladders to safely board HMS Raider.
Access is on a first-come-first-served basis and people are asked not to arrive before 11am or after 3pm.
Maryport Sea Cadets will be on hand to guide visitors around the craft.
