[Captain Nemo]

High TC and spawning of aircraft was explained in a post by Letum back in 2006, he wrote:

"Aircraft spawn at high TC, the problem is that they miss the player. Here's the maths:

Units (Planes, ships, etc.) in the 3d world around the players boat have their positions calculated in real time. This does not change with TC settings.

Units Outside of the 3d world (about 32km away from your boat) units do not have their positions calculated in real time to save on CPU. It would be impossible to calculate the position of every single convoy, destroyer and plane constantly.

Insted the game works from the 2d map that mod makers will be familiar with. The game only updates a units position every "time step". If the unit's position falls within the 3d world round the u-boat the game will begin to calculate it in real time.

If it was possible to see a unit outside the 3d world you would see it move in jumps every time step. When you speed up TC these time steps do not speed up. This mean that the jumps these units make gets bigger.

If the time step happens every second, a aeroplane is moving at 1m per second will jump 1m every time step at 1xTC. At 2xTC it will jump 2m per time step. At x1024 TC it will jump 1024m. (numbers not accurate - I don't know how oftern the time steps are!)

The faster the unit's speed: The bigger the jumps are.
The higher the TC: the bigger the jumps are.

For a fast unit like a aeroplane the jumps get very big at high TC and the aeroplane can jump right past the 32km radius round the player's boat. Alto the planes path went right past the U-Boat, the computer never calculated it's position to be near the u-boat so the plane never got placed in the 3d world.

The computer and the player have no idea that a plane just passed them".

Nemo