ORIGINAL: Chernobyl
Subs in silent mode should probably not be spottable by adjacent enemy ships. It should take a direct encounter to find the damn thing.
Subs should probably do a super alpha strike to any BB,CC,CA or DN that runs directly into them when they weren't already spotted. Think 7th Cruiser Squadron 1914, HMS Barham... Central Powers submarines sunk 10 battleships and 18 cruisers during the WWI! They shouldn't do this alpha strike to DD or Torpedo Boats though. DD should stop and spot them if they attempt to cruise over an enemy sub hex.
But similarly subs in silent mode should be blind. They shouldn't be super scouts. Historically the Germans (and Japanese in WWII etc) attempted to use sub flotillas to locate enemy fleets, but the results were usually poor to mediocre at best. Certainly not reliable. Wikipedia also implies that WWI subs had worse visibility while submerged. Maybe someone who knows the naval history could confirm or deny this. While "silent mode" doesn't equate precisely to submerged, it does partly. So that helps to justify why silent subs could not have vision of adjacent hexes.
Nice ideas. I know the Japanese used subs as scouts very poorly as well. Maybe they should only be able to scout in hunt mode?


