Let's look at the law in the U.S.
91.3 states the pilot in command of an aircraft is directly responsible for, and is the final authority as to, the operation of that aircraft.
In an in-flight emergency requiring immediate action, the pilot in command may deviate from any rule of this part to the extent required to meet that emergency.
Each pilot in command who deviates from a rule under this section shall upon the request of the Administrator, send a written report of that deviation to the Administrator.
The translation of this is there is no requirement to use any specific word or phrase in any manual, rule or law. The only requirement is that you are to handle the emergency period. Communicate in any manner necessary. If anything goes wrong it is your fault. Handle it. Mayday, Pan, Look you &%$hole, No, I am going to do the following, or whaterver phrase that is necessary is appropriate and supported by the law.
Last edited by diethelm; 28th Aug 2005 at 20:33.