runsongas
Contributor
Did you miss the statement of "length I feel useful"? The DSS is approx. 36" (perhaps a meter), and maybe less.....
Aside from being a DSMB, those are of zero comparison...
you didn't say you wanted a short smb for calm lake waters. lots of options for 1M slim smbs. subgravity, dive alert, halcyon, xdeep, etc.