For first 10 meters unit will need 2 minutes, and after that another minute for every 10m. So it is extremly slow.
It is also very risky, there is a 10% chance that unit will be lost forever. I think that means that they are dead/wounded.
Only regular or better squads, HQ and tank hunters can move underground. No sharpshooters, panzerschreks, LMGs, ...
[ May 04, 2003, 07:23 AM: Message edited by: Gamax ]