Wow something that is easier to do in Australia than the UK
Out here you:
a: register the boat at the transport office
b: register the trailer at the transport office
c: do a safe boating course (one day, $130) and then get the endorsement added to your drivers license at the transport office. ($30 AUS for a once off life time license)
(you can do all of the above at the same time, takes 40 minutes)
D: Do a ship radio operators course (1.5 days, $135) and get license for radio
E: install Radio. VHF are covered by a class license out here and require no registration as ship stations and incur no fees. MF and HF set require ship station licenses and associated fees.
If you choose to use a 27 Meg set in a boat out here, you do not need a license at all for the user or the unit.
Both 27 meh and VHF are monitored by all limited coast guard stations, but they are pushing for people to go to VHF.
Apply for MMSI online for free and get it sent to you. Enter into radio.
MMSI is not well supported out here, there is no consistant monitoring of DSC on VHF, only HF frequencies, so not much use to small boaties
Total cost is once off $30 fee for boat license, and yearly rego fee for trailer and boat of $240 for mine but depends on size.
All legal and set to go
Above is valid for QLD rego boat rego. NSW is a bit different
P.S my new Gemini 5.5 RIB with Evinrude 135 hp was delivered last week, fit out this weekend and hopefully sea trial to follow. Photos to come after that