LP98 vs HP120or130?

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rossinger

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Montreal, Canada
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I'm 6'2" 240lbs and want to stop "trying" other peoples doubles! No one has 130's for me to try, but I think I can go HP130 but am thinking LP98 as well...
 
It is all a compromise between weight, gas consumption, depth, bottom time, decompression, and reserves. Weight is more about how you plan to dive and brute strength than your size and weight.

Double 130s may be fine off a boat but not off a rocky shoreline. If your dive profile is recreational rather than “technical” than there is some wisdom in sizing gas capacity to keep you out of serious decompression on Nitrox if not air. Full twin 130s start pushing 100 Lbs PDQ. If you can get then up the ladder with water in your drysuit and swells breaking over the swim step go for it.
 
What are you using doubles for? Depth/time/duration?
Based on your size & location, and assuming you can get 3200psi fills in "lp" tanks and you have a range of depths/times/durations and shore+boat dives to do...

85s for shorter/shallower dives up to about 180ft.
130s for longer or deeper dives.

If your LDS won't fill lp tanks to 3000+ then get some hp100s for the shorter/shallower dives.
 
https://www.shearwater.com/products/perdix-ai/

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