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Keven , Re the wings , the oms is VERY expensive and leads to a lot of clutter , the bungee cord thing is abasalutly uless bullshit. Save your money and but a set of Dive Right wings and backplate , You can pick these up used an the list at a very affordable price. Regarding the tanks , There are other that are more experienced and more knlgable. Off hand , Most Cavers use steel hundred , low pressure. Dive right wings should handle this with your wet suit. You will find that Alluminum 80 work well when you dive with others who are stremlined and have good/low air consuption. You will have problems when diving with thiose whom are out of shape and have high air consuption. My guess is that your instructer has a high consuption and there fore is inssisting that YOU deal with the problem and lug the biger tanks. Personaly , of you plan an doing a lot of ofsjhore diving in cold water , then you will want to buy a dry suit. Dont make the mistake of buying what your instructor tells you to buy. He most likely makes a commision off it and is required to push the "house" brand. They want to kmake a livingf , and meny are downright dispicable self serving strokes. I am very opionanated on this , as I have been sold a ton of shit good for nothing by that type of instructor. The money you save will pay for your dry suit. Look at the cavers archive and wkpp.org and gue.com/org or somthing and read all you can on doing it right. Then come back a few days and read it agiaen , then agiemn after a few weeks. It will make sence whaen taken a a whole. Post you questions here and you will get answers. DIR will allways give you a concreate reason of whiy it is done this way , and why you have to do the follwoing ....ect this way. as it is a package deal. Dont selttle for the halpf truthes and personal prefrence reasons you will hear of others. They are usualy vague and end with I like it this way. BTW I fail to see why your instructor can not cut tjhe dive times back aor shallower and just add a dive to make up the diffence to accomlish the cource requisits. I would be nervouse diving whjith him ,as I get the feeling he has a high consumpion rate , and wants to force you to use biger tanks instead of tackiling the issue. Shucks you doing this open water not in a cave. At 10:41 AM 4/24/1999 -0400, you wrote: >Groups, > >I am currently taking an IANTD course involving advanced nitrox in >preparation for this season's off shore wreck diving. I will be diving >wet >for this season and the instructor is recommending that I purchase a set >of >dual steel 100s or 95s or Pressteel 104s. I think I have observed some >discussion on these lists regarding the issue of overweighting and I am >concerned that this may become a serious issue for me especially since I >am >5'10" weigh about 170 and have what I consider to be a very good air >consumption rate. My instructor (who I will not name) insists that I >will >need the extra gas and the weight is not an issue with the OMS buoyancy >control system, which his shop also recommends and sells. > >I am more inclined to use a set of aluminum 80s; however I am told that >this >system is inadequate and dangerous. Since this forthcoming purchase will > >invovlve a significant expense I would appreciate opinions from any of >the >list participants. > >Forgive me in advance if this seems like a dumb question; however I am >relatively new to technical diving and am having a bit of difficultly >figuring out what may be obvious to those with considerably more >experience. >Another thing is that my gut feeling is that my instructors >"conventional >wisdom" and socalled "common sense" "this should be obvious because it >is >written into the standards" does not really add up when you think >through >the process. > >Safe Diving, > >Kevin Wheeler > > >
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