First couple of ctd's at Scapa were both after firing 4 torps at target, i observed target through scope after hits and again on camera mode then hello desktop, 3rd time fired torps expected crash so didnt look at target just set course for my escape, after moving some distance away and nearing eastern escape route, went to camera mode and looked around saw smoke etc but no ctd and escaped, sure it is something to do with explosions as you have already said Trevally. As i didnt observe my hits on the third attempt, guess it could be, hope this helps.
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