My sub was stationary so the DSRV hit my sail... I had 0% where DSRV had 45% damage. The effect of my sub going down is that it seemed like flooding, but no damage... At least the blowing should help, but it did not... However, my sub was at 0 kts at all stop so the dsrv hit my sail bridge... Usually after impact the sub spins around, but mine in this case [happened only this time] went straight to bottom... I know for the speeding effect under left/right rudder, but this did not seemed normal... I was playing a custom mission from subguru where i had to pickup defecting ILA terrorists from the foxtrot sub, and i closed within 1 nm and slowed at all stop at 250 feet. I belive this is some king of bug...