I'll be applying the principles in a foreign country, whose laws are likely more lenient than the United States. Thanks for the link. Registered and taking a peak now.A lot of what @Wookie said is laid out in NFPA publication 302. Whether this is an "adequate" standard is probably debatable but you really do need to dig into the materials, construction, wiring, grounding, fuel type etc etc and not just look at fire extinguishing system as a savior. If you register you can read the whole 80 page standard here
NFPA 302: Fire Protection Standard for Pleasure and Commercial Motor Craft
Its also cited in US regulations so in theory it has the force of law.