Which Fire Extinguisher for my boat?

[sparkythecat]

I have recently acquired 17ft fishing dinghy like the one pictured below. Which type of fire extinguisher should I have on board, dry powder, foam, or C02?
I'm inclined to put on one each of foam and CO2, as I understand that dry powder can leave a nasty and corrosive residue, but is that the best way forward?

[Fishtigua]

Have a read of this American article. Don't forget the flares, lifejackets, etc...

http://www.westmarine.com/webapp/wcs/stores/servle...