Hi again. All is fine. I' m playing with TWos.
Finally I can see my sub on Nav map again.
This is beacuse during the game I type windows key to work with another applications for a moment. When I come back the game, situations such as the following occur:
The symbol of my sub in nav map is out
The crew on conning tower is out when I order surface the uboot
Sometimes near of observation periscope the image is freeze when I use the observation periscope and stop using it.
The solution is not use Tab or windows key during the game.
Regards