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.
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.