Pretty sure of the answer here, just want to confirm. Since destroyers detect subs on a one for one basis, then, 2 destroyers in a seazone would block 2 subs from moving through, but other subs could pass, yes or no??
Make a house rule for detection and make all subs off board units unless detected.
Destroyers and subs detect on a roll of 8 or less
Cruisers detect on a roll of 4 or less
