See if
THEBERBSTER doesn't reply, or send him a PM and ask him about LSH. I'm not sure how the airplane traffic in it compares to Stock. I've kind of gotten used to the idea of airplanes at any time from any directions over the years of playing the Silent Hunter series, and it just wouldn't seem right to me to not be interrupted by them every hour or sooner. I have come up too soon more than once, and had to dive right back down, when the planes turned and came back after me. The big thing is seeing them soon enough, and crash diving. Just be careful of what you're crashing into... don't wanna bottom-out at speed... I do know that no later than 1943, you can't hardly wiggle without an airplane seeing you in a lot of places... and not just one or two either... kind of like bees.