SH2 never had a time skip option per se. It just had a scripted campaign game that plopped you down in the mid-Atlantic, mid-Caribbean, mid-Mediterranean, or wherever the next mission was set after you completed the mission before it. Since the sequenced canned missions were always the same it got rather stale with repeated play, which is why SH3 has a dynamic system where you start in port every time. If you wanna get in the fight quick with SH3 it's either time compression or one of the patrol missions.
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--Mobilis in Mobili--
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