If I had the money I would have 2 Perdix AI, I don't, I have 1, so the backup is a Peregrine and SPG [and a Uwatec bottom timer in my save a dive kit when I travel].
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It shouldn't be the case, but unfortunately, is very common.If one is following buddy diving teaching from OW for recreational NDL dives, diving different profiles to your buddy is not taught as a valid method of buddy diving.
How exactly is your buddy supposed to be your alternate air source if you are diving significantly different profiles to make a difference?
Well if you are diving with a horrible buddy I would be more concerned about bringing my own redundant gas source with an independent regulator than the tiny risk of diving his computer and getting bent.It shouldn't be the case, but unfortunately, is very common.
So let me get this straight. According to most the users in this thread giving advice, all rec divers should carry 2 computers on every dive on every trip and otherwise can't keep diving on that same trip safely? Really?
So for the OP it's not enough for them to bring one spare SW, they have BOTH have to have a spare SW and carry it on every dive? Accrding to Scubadada's logic they both need spare computers because the wife couldn't use the husbands spare computer if her's fails as the husbands spare SW doesn't have the exact same gas loading (which is not a thing)?
You and scubadada are using some story to counter what I said in response to the OPs question. Again, I'm talking about buddy diving and using the read-out from the buddy's computer for the rest of the day while bringing the spare.Apologies, I thought the discussion had moved on. Regardless, multi-dive, multi-day diving, night dive finishes at 9pm, morning dive starts at 0700. I wouldn't that confident in switching computers. As for the buddy thing. I was there for him. The reverse wasn't true. I was carrying redundant gas and I'm a solo diver at heart, so no drama, but I wouldn't want to be relying on his computer. Yes, it's wrong, bad practice, against the book, but it is what it is. Lastly, a recreational Suunto computer is going to **** it's pants if you dive a Shearwater, even with a gradient factor of 30/70.
Every time I've been on a Caribbean recreational dive trip, I've watched dive teams dive VERY different profiles. On a wall dive, literally one person dives 45', the other dives 75' the whole dive. I don't agree it's good practice, but it appears to be very common.Well if you are diving with a horrible buddy I would be more concerned about bringing my own redundant gas source with an independent regulator than the tiny risk of diving his computer and getting bent.