International radio signal of distress

Answer 1

The spoken word "Mayday". There is a specific format for a distress message. The mnemonic is M.I.P.D.A.N.I.O and it goes like this:

M - Mayday (repeated thrice)

I - Identification (name and number of craft)

P - Position (latitude and longitude and/or geographic location)

D - Distress (nature of distress e.g. sinking, fire, etc)

A - Assistance required

N- Number of persons onboard

I- Information (other pertinent information)

O- Over

http://www.mcaorals.co.uk/Distress.htm