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A weightbelt is only necessary if you are diving in a wetsuit, in which case the jettisonable belt provides your emergency backup buoyancy. In the case of deco diving in a wetsuit (IMO a bad idea, but nevertheless...), the belt should go under the crotch strap, to avoid an accidental blowup if the buckle should come undone. The weight needs to be ditchable if you have to get up in an emergency, but one step immediacy is not necessary. When ocean diving in a drysuit, you may wish to move some weight from your rig to a belt, so that if you need to doff your gear and clip it off to ascend a ladder (such as in a heavy sea), or when entering a small boat such as a RHI, you won't lose the gear due to it being too negative (avoid neoprene drysuits). I don't do this, but it's your call. If you do, again it goes under the crotch strap. The only situation where you would wear the belt over top of everything is public safety diving, where swift water would make it impossible to clear the weight belt from the crotch strap, or in aerated water where ditching the weight immediately may be necessary to establish positive buoyancy. -Sean On Wed, 12 May 1999 03:44:07 -0700, Shimell, David (shimell) wrote: >Billy > >Excellent post. > >You mention: > >>He wears a standard weight belt over the crotch strap. > >One of my dislikes of weight belts is that they can come loose. I would >prefer to wear the weight belt under my crotch strap so that if it does come >loose, the crotch strap will snag the weight belt thereby preventing a rapid >ascent. The disadvantage with this approach is that dropping a weight belt >is a two step act: release crotch strap and release weight belt. > >I recognise that a dropped weight belt is less severe a problem in a >recreational dive but I have seen weight belts dropped more frequently by >accident than by design. Thus the failure mode here is accidental dropping >of the weight belt. > >Comments? > >David Shimell >Project Manager, Sequent Computer Systems Ltd., Sandton, South Africa. >Email: shimell@se*.co* <mailto:shimell@se*.co*> > >-----Original Message----- >From: bdi@wh*.ne* [SMTP:bdi@wh*.ne*] >Sent: Tuesday, May 11, 1999 1:41 AM >To: cspencer@te*.co*; techdiver@aquanaut.com >Subject: Re: Halcyon experience in Australia? > >At 01:07 PM 9/5/99 +0930, Cathy Spencer wrote: >>Hi all, >> >>I am a new OW recreational diver, looking for divers in South Australia, >>in the Adelaide area who have experience with the Halcyon style BC and >>long hose. >> >>I agree with the DIR philosophy, and like the simplicity and minimal >>configuration of the gear. However, there are no dealers in Australia >>who can provide (I havent found any) support for this gear..or the >>philosophy. > >Cathy, I dive a hogarth/DIR set up, along with a >couple of other Sydney divers. > >My son did his OW certification last year and I >built him a hogarth single rig. > >I got a small zeagle wing from a dive shop bits & >pieces bin, and attached it to one of those small >triangular plastic back-pacs that were popular before >jacket style BCs came in. You can still find the >plastic back-pacs inside some BCs (Apollo, I think). >Dive shops often have them in the spares pile. They >have a slot for a cam band which attaches to the >cylinder - in our case a 63 cu ft alloy. > >I threaded a single, continuous piece of webbing >through the bac-pac to make shoulder straps and >waist straps. I then added a couple of bent d-rings >to the shoulders, and one to the left waist strap, >a weight-belt buckle to the waist strap, and a crotch >strap that loops round the waist strap at the front. > >We added a pair of line shears in a webbing pouch >that loops onto the waist strap and that's it. > >He uses a normal DIN first stage with a second stage >on a short hose bungied round his neck and the primary >second stage on a longer hose. The inflator hose goes >through a loop of bungee on the left shoulder d-ring >and a contents guage (NOT a boot full of instruments, >JUST the contents guage) is clipped off to his left waist >d-ring. He wears a bottom timer or an older aladin pro >on his right wrist. > >He wears a standard weight belt over the crotch strap. > >The rig is so streamlined that, from the front, Jack >(the nipper) doesn't look like he's wearing a bc at >all. At the back, there's just the small wing protruding >either side of the cylinder. > >It takes an extra 20 seconds to don - the crotch strap >is an extra step - but in the water, his trim (attitude) >and lack of swimming resistance is awesome. It's the >slickest set-up I've seen. He's really happy with it. > >If you want a ready-made solution, you will be able >to mail-order a DIR single tank backplate and harness >from Halcyon in the US. > >Compared to what you'll pay for the full BC catastrophe >here in Oz, it's not expensive and it dives far, far >better. > >rgds billyw > >ps, If it will help, I'll take some shots of the set-up >and put them on a web site. Let me know. > > > > > >> >>I would like to try out the gear here in Australia, and would really >>benefit from advice from a local diver who has had the experience with >>Halcyon. Or who could let me dive with the gear. >> >>I have talked to a local prominent cave diver instructor here, and he is >>dead set against the idea of a long hose. So no support there. >> >>So I am stuck between choosing a back lift style BC, from a supported >>brand (ie Sherwood outback) and the Halcyon gear, which I havent tried, >>but think is better. >> >>Any help would be appreciated, >> >>Cathy Spencer >> >>------------------------------------------------------------------- >>Email:cspencer@te*.co* >> >>Analog Electronics : >>The pristine regimented symmetry of digital circuit boards >>is occasionally interrupted by an irregular huddle of linear >>components. These aberrants are tolerated because they perform >>a variety of tasks necessary to keep the digital system running. >>------------------------------------------------------------------- >>-- >>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'. >-- >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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