I believe Autolycus had been removed from the MR1 by the time I arrived on Nimrods but I recall a particular homing on a cruise liner while on 203 that was hopeless, up front we were watching the beast belching smoke while criss-crossing behind it, with only the intermittent autolycus in cry. It dawned on me the other day that not many subs had their snorts about 16 stories high Oh well, better 42 years too late than never
