Submersibles aren’t in the rules at this time, so there’s not much point in giving observation aircraft the depth charge trait.
The primary author of the rules has been posting over at the DakkaDakka forum since early this year under the name “MongooseMatt” (he’s the one that first made me aware of this release). Between items like the depth charges and radar on capitol ships (the American capitol ships all have Advanced Radar – Essex gets it right from the start, and both of the USN battleship classes get it in refits), and some of Matt’s comments over at DakkaDakka (for instance, he mentioned rules for submarines), it’s pretty clear that there are rules that aren’t included in the starter rule book. I would hazard a guess that when the rule book is released separately, it will be much more exhaustive than the book that’s found in the starter. Radar, for instance, will probably be useful during night battles, which were an important part of the era but aren’t mentioned at all in the rules that we now have.
Hopefully we won’t have to wait long!
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