For those of you in launching on a slipway without a nice pontoon the solution is here!!
Well might do the job !!
Ps I'm not selling these at all just thought it could be a solution!!.
An always remember to close the hatches on the cab when entering the water I seem to remember getting V wet when the bow wave came up the windscreen and down the cab roof hatch, might have been an M1 rig, but wet it wet.