I do not think the river current is ripping at 10-15 knots. 4 knots is impossible to swim against. The Niagara River isn't much different from the St. Clair River farther upstream in the system. With that being said, this is a very rare situation that the comm/ tender line failed and the diver was lost. It makes me wonder if the harness, D rings, or whatever else the line was hooked into failed, ripping the diver away from the line. I take it that we do not know if things on the tenders side of the line worked or failed? As I assume for the Niagara, we are taught that unless if it a life threatening emergency, never ever surface in the middle of the river as boaters and ships may not see you.
Tbzep, in my experience in heavy current if you are not doing a drifting pendulum, the best that works for us is to be extremely heavy (not heavy enough so BCD won't work), keep as low to the bottom as possible, and use claws, hammers, stakes, and whatever else can be used to assist you fighting your way upstream.
Tbzep, in my experience in heavy current if you are not doing a drifting pendulum, the best that works for us is to be extremely heavy (not heavy enough so BCD won't work), keep as low to the bottom as possible, and use claws, hammers, stakes, and whatever else can be used to assist you fighting your way upstream.