 The ship mounted four 45 @-@ calibre 4 @.@ 7 @-@ inch Mk IX guns in single mounts , designated ' A ' , ' B ' , ' X ' , and ' Y ' from front to rear . For anti @-@ aircraft ( AA ) defence , Comet had a single QF 3 @-@ inch 20 cwt AA gun between her funnels , and two 40 @-@ millimetre ( 1 @.@ 6 in ) QF 2 @-@ pounder Mk II AA guns mounted on the aft end of her forecastle deck . The 3 @-@ inch ( 76 mm ) AA gun was removed in 1936 and the 2 @-@ pounders were relocated to between the funnels . She was fitted with two above @-@ water quadruple torpedo tube mounts for 21 @-@ inch torpedoes . Three depth @-@ charge chutes were fitted , each with a capacity of two depth charges . After World War II began this was increased to 33 depth charges , delivered by one or two rails and two throwers . 
