ORIGINAL: Mike Scholl
A perfect example of this is the "Manilla ploy". In real life, subs came and went all the time, and for safety reasons most of them in the Bay submerged during daylight hours. In the game the Japanese player KNOWS that they will be docked and vulnerable and that he can sink them in large numbers on the first turn if he wants to.
Mike,
I think it was only really commonplace for USN subs to submerge during daylight hours AFTER the onset of hostilities. In the days prior to the onset of hostilities, I don't think this was done that often.
Having just pulled off the "Manila ploy" with KB in my two PBEMs, I can rationalize the move easily. IJ sympathizers or embassy employees in the Phillipines could easily have been keeping tabs on USN movements in the days before the attack, as they did in PH IRL. I will default believe the OOB and setup that AE has provided us re: whether ships were docked or not on the morning of December 8 local. I'm open to evidence that shows that 50% of the submarines were submerged in harbor or on patrol, but I'm guessing that's not the case.
The trade off that I gave my PBEM partners was that I port strike on December 7-8 morning phase in only one time zone. I can't get around temporal reality and Newtonian physics. A surprise attack in PH on the am would have been at least many hours later in the PI, thereby negating realistic surprise. So, in both cases, I opted for only Manila strikes.
I think if players are considerate of one another with a nod to metaphysical reality, that will go a long way to engendering a pleasant start to a PBEM. Do unto others and all that...