Switching Divers Under the Ice.

[Hydro]

meh, if you can see the hole and you have a pony or can see another diver within 20 feet id say the risk is pretty low... if you were switching divers and didn't have a pony with 3 feet of vis out of sight of the hole, id say that is something id wouldn't be comfortable with for just screwing around.

with the way we usually ice dive, pushing the block under the ice and just over to the side, its quite important to have surface people in-case the block does go back into the hole... most of the time the diver can remove it, but not fast... ive knocked it back into the hole before, but didnt even give it a second thought as i swam away... knowing the surface can clear it when needed.

i go with a 15 second rule as thats the length of time i can knowingly hold my breath if im starting at my max heart rate under max physical exertion.

ill throw this out there: solo ice diving on a non-penetrable wreck using a cave reel with 75 feet of vis.... if the hole is right above the wreck say the Hercules.

or partial ice covered diving (with defined ice areas) with no lines in weeds and low vis?