And 'Legalities' aside, a 'nice option' to have is a GME 310 GPS EPIRB in ya top left pocket.
And register it with AMSA. Can be done 'on line'.
Yes, it should fit, they are 'cheap' insurance, and last for around 8 years or so before requiring a 'new battery'.
The reason 'new battery' is in inverted commas, 'coz, as at 1/6/14, when I enquired last, they are a sealed unit and the battery cannot be accessed to be replaced.....they will sell you another at a 'reduced rate' instead....so the Canning Vale WA GME shop said....
Cheers