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I have recently bought what i thought was a smb, however i have noticed it does not have a over fill air release valve on it.
Does this mean that it cannot be deployed from beneath the surface.
I would have thought any excess air would simply blow out the bottom, the bottom has a flexible flat weight which can be flexed in an open position.
Without the over pressure valve, it depends on the design of the bottom. If the design allows air to escape, then it can be deployed at depth. If not, then it's a surface marker only.
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I have deployed such a marker "at depth" many times without a problem. I put "at depth" in quotes because it can mean anything from 15 feet to 300 feet. If you are at 33 feet and fill it half full, it will be completely full at the surface. If you are at 66 feet, 1/3 full will get it full at the surface. I have overfilled it a bit by those measures more than a few times, and the result has been one rock hard SMB at the surface, but no problems otherwise.
If it does not have an oral inflate and is to be inflated using a second stage in the bottom, it is intended be inflated at depth.
I believe I have one similar to the one you describe, and the expanding gas spils out the bottom. The metal flaps are supposed to help it maintain it's fill if it falls over at the surface.
Tim
"They called themselves Guerrilla Divers.
Composed of elite divers with Macho mentalities, back when men were men, and FEAR was a lispy companion of the common Man. It was a time before insurance liabilities, lawsuits or beauracratic regulation of the "sport". Guerrilla divers didn't need "Buoyancy Compensator Vests". In fact, "Anyone who needs a BC deserves to drown" was a popular adage. Exploration and the Hunt came first, excitement and fun followed. Safety was the stepchild of fitness, good reflexes and a cool head.
This was a time of great Adventure." www.sfdj.com
Look for me at http://BlueAngelScubaSchool.com
on Twitter @BlueAngelCoz
and on Facebook, you can LIKE our Blue Angel Scuba School page! https://www.facebook.com/pages/Blue-Angel-Scuba-School/253602211356099
The human brain now holds the key to our future. We have to recall the image of the planet from outer space: a single entity in which air, water, and continents are interconnected. That is our home.
- David Suzuki
Tim
"They called themselves Guerrilla Divers.
Composed of elite divers with Macho mentalities, back when men were men, and FEAR was a lispy companion of the common Man. It was a time before insurance liabilities, lawsuits or beauracratic regulation of the "sport". Guerrilla divers didn't need "Buoyancy Compensator Vests". In fact, "Anyone who needs a BC deserves to drown" was a popular adage. Exploration and the Hunt came first, excitement and fun followed. Safety was the stepchild of fitness, good reflexes and a cool head.
This was a time of great Adventure." www.sfdj.com
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Originally Posted by Karibelle
