Not to beat a dead horse, but legally...none of them. Where I live the fire/rescue are volunteer and as such have limited funds so only officers and select members get supplied with HT's. Others purchase radios with their own money and many of them use ham radios. "no body cares", "I'm only using it to help people, so nobody will say anything", but let something go wrong...... One in a million chance I know but are you willing to take it? You need to realize what could happen in a 'worst case scenario before you go there! That being said, a good mono-band 2 meter that will do narrow fm is what you need to look for. Yaesu, Icom either one will work....from my experiences stay away from cheap Chinese brands as they tend not to be as stable or durable. BTW I've been in emergency services as law enforcement, firefighter, EMT, HazMat tech for 25+ years and am now retired. I survived without ever having to use my ham radio for communications in an emergency (even before cell phones). Good Luck.