SMB from depth?

[teknitroxdiver]

Can this SMB be shot from depth?

http://xsscuba.com/safety_tube.php

How about this one?

http://www.leisurepro.com/Catalog.aspx?op=ItemDisplay&ProductID=OMSLB5E

thanks

[roturner]

Can this SMB be shot from depth?

http://xsscuba.com/safety_tube.php

How about this one?

http://www.leisurepro.com/Catalog.aspx?op=ItemDisplay&ProductID=OMSLB5E

thanks

The first one has a valve like a thermal-rest (small air mattress for camping). I doubt you could shoot it effectively from depth and if you found a way to do it you'd need to install an opv so it didn't burst..... The second one looks like a stnd open ended jobbie.

R..