Realize that if we have them located, we would still claim not to know where they are.
It doesn’t matter if we know where they are if we don’t do anything. Sinking the subs after they have launched all their missiles is like wetting down the ashes after your house burned down.
My thoughts too. Satellite pictures would pick them up even when leaving base.
Exactly. You never give away a capability, never give away any information to the enemy. You just don't want them to know. Do we know where you are, or not? Are you safe, or is there a sub trailing you with a targeting solution already set, just waiting...
We never admit "we have you" 'cause we don't want the other guys to know if they need to try harder or not.