B-17 the mighty eighth puts in charge of a Bomber, although it's much more hands on than Silent Hunter.
Star Trek Bridge Commander puts you in charge of a spaceship from Star Trek.
Dangerous Waters is like Silent Hunter but with modern vehicles. It puts you in control of either a sub or a destroyer(although the maps are smaller than SH's).
There are several tank sims that put you in charge of a single tank or tank battalion(Steel Beasts Pro, Steel Armor, Blaze of War).
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