Very Good advice from Mateboy,
But if your going to do it then I dont see a radar reflector on your list and a get you home long shaft wing engine or a sea anchore or a spare VHF/gps or raft ?
If we assume the boat is up to it and you have all the kit required onboard,then I would ask myself what is the downside,and it is in my oppinion three things.
1 x being thrown out the boat and your on your own in the oggin and cast adrift from your boat and cant get back.
So the best survival suit you can get and a means of communication and waterproof positioning system in your pocket gives you a small chance,if there is a passing ship,as dependant on your hand held vhf range it might not reach a land station.If your going HHeld then a loud speaker output is very helpful.We have a axis 2oo from naviko that is both waterproof and laud. Some pocket flares mayl help in attracting some attention,but better than nothing.A small waterproof gps will be of help in giving your position out hopefully on your HH vhf.
2x All Engines go down well offshore,Deploy your sea anchore from the bow and wait for assistance from a passing vessel.It may be very cold and it may be night time so good lights may be needed and radar reflector, and food and warm clothing.Seperate batteries for your HHeld /gps/lights will be a god send on a rib at night with no power offshore.
3 Get a Ce marked cat B offshore rib,but I dont know of any that
are that size ?
This is bye no means a diffinitive list just a few bits that may be of help.