 Fredericton 's design was slightly revised from the earlier Flower @-@ class ships . Corvettes built before 1941 behaved poorly in heavy seas , so her length and weight were increased . She was also outfitted with a water @-@ tube boiler which was more powerful and stable than earlier models . Her armament was limited to a 4 @-@ inch ( 100 mm ) gun forward and a 2 @-@ pound ( 0 @.@ 9 kg ) pom @-@ pom gun aft gun as well as depth charge throwers which suited her escort duties and anti @-@ submarine capabilities . Later on she was outfitted with the improved Hedgehog anti @-@ submarine device . She was manned by a crew of 85 which included six officers . Her unofficial emblem was a badge emblazoned with a flying tiger dropping a depth charge on a U @-@ boat . 
