Staying under all day and surfacing at night to charge batteries(both the subs and the crew's) was the standard tactic when the war started and many used it for the first part of the war.
Mid to late war some bold skippers decided the yo-yo method was best, and it is.Yo-Yo meaning diving only when have to, to avoid planes or to attack.They also began using night surface attacks from 1943 on, using the submarine as a torpedo boat that could submerge.
Think is, when you stay under all day, you hamper yourself but burning fuel, recharging batteries consumes a lot of fuel, you do this day after day, your time on patrol will be cut short.Also, you can't cover the miles and cant see as far with periscope only, thus wont spot target earlier, so may miss a chance to attack because spotted them too late.
I know this because in early war, I use historic tactics(for the challenge) and stay under all day, surface at night.In mid to late war, I use the yo-yo method and can just see the difference.
Only exception is say if I am near the coast of Japan during day, stay under, because planes will be on fast, plus even the top late war subs like the Tang etc patroled submerged when really close to shore.
Of course, I use mods...TMO 1.9 in particular, in stock I stayed under a lot because of the ridiculous amount of planes.Stock was almost unplayable at times due to the planes.
|