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why would you pay a premium to get a ss backplate, then pay a premium for OMS tanks, which as you mentioned suck as soon as you scatch them, when you could just get the cheaper PST's in the first place? That is the exact opposite of DIR. Jess -----Original Message----- From: Ross Bagley <rab@ju*.ne*> To: techdiver@aquanaut.com <techdiver@aquanaut.com> Date: Thursday, March 16, 2000 4:00 AM Subject: Newbie buying Doubles (OMS vs. PST) >This is the upgrading of a discussion on rec.scuba... > >I am a relative SCUBA newbie, but trying to get the right equipment >the second time around (Zeagle Ranger currently for sale on eBay to >make space for a Halcyon rig). I want to build my first doubles rig >so that when I am experienced enough to benefit from GUE in a few >years, I've already been diving the blessed gear for years in open >water and am completely comfortable with it. To that end, I have >asked which steel tanks are preferred by DIR divers on rec.scuba. > >I have gotten about equal responses for Faber/OMS and PST, but one >person indicated that PST were the WKPP/DIR "blessed" tanks because of >their bouyancy characteristics. I wanted clarification on this but >nobody on rec.scuba has stepped forward with anything compelling, so >I'm hoping that the guys who really do the diving can help me out. > >OMS 98's are neutral when empty, PST 104's are -2.5lbs when empty. My >contention is that a heavier backplate or v-weight will allow a diver >to have exactly the same bouyancy, but with better trim, as the weight >will be closer to the center of mass if it's in the backplate than if >it's in the tanks (shorter inverting moment). Completely theoretical >argument as I have only dived the OMS 98's (and did that wet) with no >comparison to the PST's. If the argument doesn't hold water, I would >love to understand why. > >Another point is that locally, most/all of the people I would want to >dive with (those who have gone to or expressed interest in GUE >training) own Faber/OMS tanks. I don't think that the gear similarity >part of DIR buddy equipment selection has to extend to the tanks as >well, but I could be wrong on that as well... > >Finally, OMS might not use hot dip galvanizing, which would make their >corrosion protection clearly inferior to PST, though I am contacting >OMS directly to determine what they actually do for their galvanizing >process. > >Thanks for any assistance, >Ross > >-- Ross Bagley & Associates http://www.rossbagley.com >"We don't write your software, we help you write your software better!" >-- >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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