"The raft needs certified every year or so to be reliable."
One might suggest that is Orwellian Doublespeak created by the industry.
Rather, let us say the existing rafts are all so UNRELIABLE that they need to be checked annually to see how many repairs
they already need after one year in the can.
The whole concept
of recreational life rafts badly needs to be re-examined from scratch, and something more suitable cobbled up to replace what's out there.
Something like the Ansari-X prize, or the prize given for the first chronometer...there's a world full of engineering students whole would love a host at something like that. The only question is, who to sponsor
Right now the best addition you could make to a ditch bag would be a couple of rolls of gaffers tape (not duct tape), some Bostik adhesive
, some urethane adhesive
, some clamp plugs, and perhaps a coupe of cans of self-expanding urethane foam, which would certainly fill and seal a leaking tube, especially a wet one.
Hardly reliable to start with.