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What a small world - I was on the manta dive that friday as well! I went with wannadive and we were the last boat to leave. While we were getting out a manta came by so I got to snorkel with it for a while. Pretty cool, although since it was my first manta dive I was a little bummed that...

I'm not sure about officially how you should prepare the tanks, but you will find that USPS is much cheaper than UPS or FedEx for any shipping to Hawaii. Parcel post takes ~2-3 weeks, usually, while Priority gets here in the standard 2-3 days. I'd make sure to seal the neck opening with...

I second the hang gliding before diving. Otherwise, use the NOAA tables with their ascent to altitude chart based on what altitude you're going to. Remember, driving up from the coast counts even if you stay on the ground. http://www.ndc.noaa.gov/pdfs/AscentToAltitudeTable.pdf Don't...

I doubt that two hours of mask clearing with proper technique would cause problems - basically you just breathe out through your nose which you (presumeably) do all the time. However, since you're having problems I wouldn't be surprised if you are more forceful than you should be or possibly...

What you are looking for is likely at Dive Planning forms, tables & formulas specifically, www.ndc.noaa.gov/pdfs/AscentToAltitudeTable.pdf . Please note that table refers to the NOAA dive groups, not the PADI groups. I live at ~2500 ft elevation, but am only about 15-30 minutes away from...

There's no question in my mind if the "Cobra data" is valid. Just to be clear, the diver group and time to ascend to 3000' from the "Cobra data" is actually from the NOAA tables. I just calculated those values based on the NDL times from the Cobra manual for the Suunto algorithm. That's the...

bleeb - Thanks for the tables, that was exactly the information I was looking for that I hadn't seen anywhere else. I'm going to print those and keep them with me from now on. It looks like for most cases I'll need 1.5-3.5 hours which isn't bad, and for more aggressive dives I'll have to amuse...

I live about 20 minutes from the beach, but its somewhat steep so my house is at about 2500' elevation. Should I be concerned about driving home soon after getting out of the water? I've been told that it should be ok, but I've also read recommendations to stay lower than 1000' (or is it 500')...

I'm fairly inexperienced but since I've moved to Hawaii I plan to dive more in the near future. I'm putting together a set of gear and am trying to decide on what reg to get. I'm considering either the Aqualung Titan LX, or the Scubapro Mk11/Mk17 with either R395 or S555. I don't have...