Timberwolf,

I agree for the most part and am not trying to create an argument. My info is not off of any wiki - I know there is no standard for transmission wattage. I also know that all 406 ELT's that I've ever seen and I think I've worked with all of them - transmit at 5 watts. I also know all 121.5's transmit at between 75 and 100 milliwatts for the same reason. Whether there is a standard for either is a mute point - that is simply how they were/are all designed.

Also, to clarify, I never said they transmitted voice from a 121.5 ELT, I said aircraft primarily monitor voice on 121.5 - as it is also (and primarily now) an emergency voice channel.