Cumbria's two adopted warships will make a joint visit to the county for the first time for a maritime festival.
HMS Cumberland will be open to visitors during the festival
HMS Cumberland and HMS Walney will be open for visitors at Barrow's Festival of the Sea on Saturday and Sunday.
Other attractions will include flying displays by an Army Chinook helicopter and a Royal Navy Lynx helicopter.
HMS Walney helped recover a World War II bomb in May from the River Mersey while HMS Cumberland helped seize drugs worth £200m in the Caribbean in 2005.
HMS Cumberland's commanding officer Cpt Simon Ancona said: "This will be a fabulous event and we are thrilled at being able to return to our affiliated region.
"There is always a warm welcome for us and we look forward to all our visitors."
Both ships will be berthed at Devonshire Dock.