Here's what the hymns of the Church say:
Crossing the waters as on dry land, In that way escaping From the evils of Egypt's land, The Israelites cried out exclaiming: To our Redeemer and God, now let us sing.
Israel treaded on the sea's swelling billow, which had been rendered once again into dry land. Then the dark waters concealed all the Egyptian riders together, as a tomb laid in water, by the mighty strength of the right of the Master.
Once did the sun look down upon the surface of the dry abysm-bearing plain; for the water like a wall on either side was congealed, for a people walking crossed the sea, making God appealing melody. Sing to the Lord for He has been gloriously glorified.
Regardless how we spell it, the Egyptians drowned.