Fiberglass seats we borrowed from a local trash bin. We run a seperate line over the side, and in wavy days you get a nice ride. (Joke) Actually just a simple splice in line and a couple of plastic and nylon loops. As well as snaps and a gear bag, Just In Case any one wants to use same. I know a number of places and ships do it this way, just trying to get a differing perspective from people that have done this as well. Use also discarded lead for bottom of line. It is little details that make up a good operation. Seperate line makes it very easy to mark depth. Anchor line and fixed mooring bouys lines, is difficult to mark and always changing. So seperate line increases safety and makes life a lot easier for all. Spectra O2 clean hose is very very cheep, couple of one way valves, couple of clamps. This hose is very very strong and light. Whole thing for under a couple of hundred Euros. I know couple of places that do this for some events and such. Why not do it full time???? Should help everyone who wants to with deco. And you don't have to drag extra tank around. Begs point: how many dive boats carry spare O2 tanks and know what style valve customers use? I fully expect the naysayers to come out in force, seems that this is best use of this place.