can't argue much then . Reading Tom Clancy makes one no expert , as ı should learned by now .
and while we are on it , is it really possible for a French and British missile boats to be in the same patrol area , not hear each other until the last moment and believe that they must have collided with a sunken shipping container and go home ?
Being in the same patrol area would certainly be possible. I would guess that no navy would assign two of their own to the same patrol area, but even allies like GB and F would probably not coordinate that since missile sub location data is among the most highly classified information there is.
Not hearing each other until the last moment. Like the moment both of them hear some sort of crunching scraping sound and say 'what was that?!?' is probably possible. I'm not up on current technology. Sound isolation-making the ship quieter- competes constantly with improving sonar -better listening- if this event happened in a time when sound isolation was running ahead of sonar, which in my time it usually did, then yeah, two subs creeping around doing their best to not be heard could just bump into each other. Assuming no significant damage to either one (meaning some sort of 'glancing blow' where neither really just plowed right into the other) there wouldn't necessarily be any change in their sound characteristics so they could both just go on creeping and not have any clue what they hit.
In their mutual cluelessness would they both come up with the same 'sunken shipping container' theory? They were in the same place, so likely enough they would come up with the same 'most likely' answer, yeah. It seems a little odd to me that either of them would come up with sunken shipping container, since I personally would expect a shipping container to float for a while, and when it didn't any more that it would just go straight to the bottom rather than submerge to my submarine's operating depth and wait there like some sort of trap...but again, when stuck with the inexplicable people will
always come up with something.
As a side note that may actually have been mentioned in a Clancy novel but is also true...Human nature is to deal in few significant digits. You don't hear orders like 'make your depth 416 feet', you hear 400 feet. It's just how people are. So, while it was not in any fleetwide instruction or anything (AFAIK, that would actually have been above my paygrade so I'm not sure, but I got the feeling it was more a common sense thing), we avoided operating at depths where our simple number in feet coincided with a simple number in meters. Like at 300 feet a boat is less than thirty feet above someone running at 100 meters...and since their boat is more than thirty feet tall that isn't good for anyone. Clearly in this situation being the only country using an obsolete measuring system for depth is an advantage.