I know this has been touched upon before but was wondering if the type of extinguisher was governed by MCA regs???
Mosty people seem to have powder types fitted but I HATE them - they make a hell of a mess when used and can make even a simple fire into a huge repair job.
The old green Halon types were definitely the best but as usual they have been banned although may still be used in aircraft and other "high risk areas"!!!
AFFF(foam) seem the ideal solution but I haven't seen any boats with them fitted.
There is one cheapy called "saveboat" sold by compass for £14 but it looks useless - most seem quite expensive buit then I came across this
It is a 2 litre foam for £31 which seems good value for what it is.