Good one for an absolute beginner... but... you didn't show the most important stuff... the merging of bow and stern sensors/trackers data in waterfall (Master 01, Master 02 etc) and their usage in TMA. We know that crossing of bearing lines in TMA gives much more accurate picture about contact's heading, speed, distance etc.
1. First two bearings crossing gives: Exact Bearing, Approximate Distance, Unknown Speed, Unknown Course;
2. Second two bearings crossing gives: Exact Bearing, Exact Distance, Approximate Speed, Approximate Course;
3. Third two bearings crossing gives: Exact Bearing, Exact Distance, Exact Course, Very good idea of contact's speed.
It turns out that minimum time for a decent TMA solution is at least 6 minutes, the more time you have to observe contact, the better solution is! That's why the distance, i.e. first bearings crossings, is the most important part of the solution, it gives you the idea how much time you have! That is why the quietness of a sub is it's the most important feature... it comes down to "who hears who first"...
"Dangerous Waters" in difference of it's predecessor "Sub command" has one BIG flaw, the sensors (bow and towed arrays) are limited to exactly 10 NM... maybe 11 NM in clear weather, and their sensitivity is about the same... In "Sub Command" if you cannot hear a contact with bow sensors, but you can hear it with towed array you are pretty safe, and have enough time for tactical maneuvers... but that's another story...
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Come closer... and die.
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