halifax class frigate flower class corvette ordered quebec laid march launched september commissioned december named community new_brunswick design slightly revised earlier flower class ships built behaved poorly heavy seas length weight increased outfitted water tube boiler powerful stable earlier models armament limited inch gun forward pound gun aft gun depth charge throwers suited escort duties anti submarine capabilities later outfitted improved device manned crew included officers unofficial emblem badge flying tiger dropping depth charge boat served battle atlantic escorted oil caribbean new_york_city escorted convoys later atlantic northern_ireland decommissioned july question final disposition lies possible error sold scrap ended japanese advent world war greatly desired build naval class warships canadian ship building yards capable building vessels time impossible buy ships britain capacity taken entirely defence needs decided modified whale catcher design built canadian yards later traded britain tribal class destroyers scheme eventually failed ordered whale ships originally ordered built basis corvette fleet initially expected corvette fleet superseded line larger frigates destroyers montreal prevented larger ships getting atlantic_ocean shipyards corvette fleet stayed eventually built largest class ships dubbed flower class similar british design british gave names flowers decided ships canadian towns called town class line american destroyers term flower retained canadian construction laid march completed months days later september total cost construction commissioned active duty december design class built ships class including calgary improvements original design included lengthened forecastle foremast moved main bridge improve forward vision sheer bow increased improve performance heavy seas earlier flowers twin inches machine guns proved ineffective revised flowers built single cannon mounted bridge built water tube boiler ships built marine boiler revised design water tube boiler available earlier boilers subsequently standard future ships smaller safer easier maintain marine produced reliable supply steam feet inches long feet longer earlier designs allowed longer forecastle added living space dry quarters wide draught forward aft driven single screw triple expansion engine ihp gave speed knots like installed type detection system technology designed armed royal_navy system outdated best system available time type detect distance underwater sounds determine depth armament armed inch gun forward pound gun mounted aft cannon mounted bridge wings air defence depth charges rolled stern ports thrown launchers aft anti submarine warfare later war outfitted effective depth bomb throwers crew built crew including commanding officer officers december july commanded acting lieutenant commander commanded july july lieutenant commanded july decommissioned july served february december march april badge canadian naval ships world war adopted unofficial coat arms exception badge displayed bridge flying tiger dropping depth charge boat war duty served battle atlantic december end war launched spent short time undergoing sea trials january july escorted convoys halifax new_york_city boston increased boat threat caribbean oil shipments halifax started experiencing oil shortages tanker convoys organized caribbean ports halifax new_york_city july assigned escort convoy halifax insufficient ships convoys canadian temporarily transferred american naval operational command convoy escort new_york_city participated oil convoy escorts september february caribbean duty transferred duty new_york_city newfoundland came close seeing action assigned convoy march turned march days later convoy attacked nearly boats resulted sinking ships major refit reassigned october escorting convoys northern_ireland spent months capacity undergoing second refit september remainder war served ocean escort time fired cause use weapons anger earned reputation ship convoy record summary disputed disposition sources lynch july transferred sydney nova scotia decommissioned disposal scrapping sources claim mistake switched records alternative information shows sold registered flag los renamed olympic fighter use subsequent names included
HMCS Fredericton (K245)