Background HMCS Magog (K673)

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the river-class frigate designed william reed of smith s dock company of south bank-on-tees. called twin-screw corvette , purpose improve on convoy escort classes in service royal navy @ time, including flower-class corvette. first orders placed royal navy in 1940 , vessels named rivers in united kingdom, giving name class. in canada named towns , cities though kept same designation. name frigate suggested vice-admiral percy nelles of royal canadian navy , adopted later year.


improvements on corvette design included improved accommodation markedly better. twin engines gave 3 more knots of speed extended range of ship double of corvette @ 7,200 nautical miles (13,300 km) @ 12 knots. among other lessons applied design armament package better designed combat u-boats including twin 4-inch mount forward , 12-pounder aft. 15 canadian frigates fitted single 4-inch gun forward exception of hmcs valleyfield, upgraded double mount. underwater targets, river-class frigate equipped hedgehog anti-submarine mortar , depth charge rails aft , 4 side-mounted throwers.


river-class frigates first royal canadian navy warships carry 147b sword horizontal fan echo sonar transmitter in addition irregular asdic. allowed ship maintain contact targets while firing unless target struck. improved radar , direction-finding equipment improved rcn s ability find , track enemy submarines on previous classes.


canada ordered construction of 33 frigates in october 1941. design big locks on lachine canal not built shipyards on great lakes , therefore frigates built in canada built in dockyards along west coast or along st. lawrence river below montreal. in canada ordered construction of 60 frigates including ten royal navy transferred 2 united states navy.








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