 She was fitted with a 24-barrel Hedgehog spigot mortar.Two depth charge rails and four throwers were fitted for 50–60 depth charges.HMS "Carnarvon Bay", named after Caernarfon Bay (anglicised as 'Carnarvon Bay') in Gwynedd, Wales, was originally ordered as the vessel "Loch Maddy", but the order was changed in 1944.