HaLeiVi:
1. Only if it was dry land
2. Only if the water was above your head (one can easily drown in a swamp)
3. Only if those chasing you were drowned through no effort of your own
P.S. The idea that they crossed a giant ocean comes from a Christian mistranslation. Jewish sources never claimed they crossed the “Red Sea” (which is quite deep, and there is no reference to them going down and up and incredible slope, nor of any sort of bridge over the chasm popping up).