In a field of medicine where precise procedure and clear-cut decision making should be the rule, it is perhaps depressing to address a subject where too little is certain and possibilities are almost endless. I regret that this should be so in respect to medicolegal problems in air transport, but such are the facts which have to be reported.

A clear-cut authoritative guide to each and every situation is not only impossible in the air, it is also impossible on the ground. Were it not so, there would be no need for lawyers—and herein as we may see could lie an important clue.