Hi Rich A co-worker (ichthyologist) of mine is interested in a rebreather so he can go fish watching and counting without less bubbles. None of this work is deep (<20m) and he will be using air or EANx. He has a limited budget. Initially we had talked about a draeger semi-closed unit but after some of the comments on the techdiver list I'm not so sure that this is a good idea ... but then again it's a little hard to sort through all the bullshit. So here's a few questions. I've read that SC units emit more gas than closed units. Is there much advantage in using a SC unit over open SCUBA in terms of bubbles ... or do you really need to get into a closed circuit rebreather to reap the benefits. Do you think a semi-closed unit is safe for this sort of work? If so what types should we look at? Do you know of anyone working on fish behaviour etc that uses a sc rebreather? Thanks in advance.. Kia ora ..R ps going to Borneo in October (Sabah and Sarawak) anyone know any exceptional dive spots? Rod Budd r.budd@ni*.cr*.nz* National Institute of Water and Atmospheric Research Ltd. (NIWA) Gate 10 Silverdale Rd PO Box 11-115 Hillcrest Hamilton New Zealand +64 7 8567-026 bus +64 7 8560-151 fax +64 25 734-066 mob
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