Rundhorchen

[the.terrabyte.pirate]

I tend to stay submerged for the majority of the time I'm patrolling. I only surface to recharge the batteries or chase down a contact. It takes longer to get about, but you end up with more contacts to make it interesting, and plenty of fuel.

I normally aim to spend the entire daylight hours submerged. After nightfall I'll surface and recharge. While I'm doing that, I'll drop down to 25 meters every 2 hours or so for a half hour sweep of the hydrophones. By daybreak the batteries are full, and back down deep I go.

[Blacklight]

It takes forever to get to my patrol area, but in areas that I know are trafficed, I'm usually submerged all the time, only surfacing at night to recharge the batteries. Staying submerged most of the time will really slow down the trip but will cut down your chances of missing nearby targets.

If I run into a single ship, I have no problem taking it out in daylight. When I find a convoy, I usually shadow it and wait for night to make my attack.

There's no real formula. You just do what works for you.