Yeah I agree not too much different but there is something to pass along to a team that hasn't done any inwater subbing. Watching for teammates coming to the sub box is more important than watching the game. On deck this was usually not an issue as you could see people come bailing out of the water, and you were up on dry land breathing and maybe talking if for some reason you didn't recognize who just rolled up on deck, you'd soon hear the shouts of your coach/teammates. With in water side subbing it is very easy to get distracted by watching the game happen and not realize your subbing buddy has exited the playing area. Amazing what can happen in just a couple crucial seconds.

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An aquifer is a water bearing layer of rock or soil. Aquifers are separated by impermeable layers of rock or clay called an aquitard. Aquitard, however may sound a bit offensive to some, and therefore we will be changing the name to Aquachallenge.