I have purchased a 1995 boat that is not on the SSR. I have been told it is an easy exercise to register. Can anyone the fores and against registering?
For - it gives you a document that you can wave at officials (particularly on the continent) that appears to satisfy them as to your ownership of the boat, even though it proves no such thing
It's a useful identifier and you can paint it on your dinghy without giving away the name of your boat to the nearest tea-leaf.
It is, indeed, dead easy to do.
Against - it doesn't provide any legal proof of ownership; you'll need Part 1 for that.
It has to be renewed every five years and you have to pay a (modest) fee to do so.
If you are really paranoid, you may chose to believe that it puts your details on a Big Brother database that will make it easier for the Government to start robbing you when they introduce their annual boat license fee
IMO it is worth it and basically a good thing to be on the SSR unless you actually need the part 1 registration because of proof of title, bank/mortgage requirement or commercial use.