thanks chuns it does help.
So my reading of this is in order of preference:-
1. Life Raft
2. PLB / EPIRB
3. Survival suit.
The list you give is quite extensive - e.g radar reflector. I would be interested in your comments on a typical Light Aircraft liferaft and its bits. Remember we typically have a small door with which to espace and carry the life raft thru.
(see
http://www.survivalproductsinc.com/fourman.htm)
I think you have convinced me to buy a PLB for my longer trips!