Enough time underwater and you see some scary moments.

I won't buddy up with strangers on a dive. I have seen the full range of people that manage panic very well and very poorly... and it is valuable to truly understand a dive partner before dropping 60ft with them.

I hope the diver you saw found some inner calm along the way or chose to quit diving.

>easier to save an unconscious person…

This was a solid reality check in rescue training. Every potential rescuer needs to first know that someone potentially drowning will try to climb whatever they get their hands on… including the rescuers head. If there is no floatation device, rescuers have to be insanely careful.

“Antennas are generally full wave, or a precise fraction of a wave for the frequency.”

Wild. That sentence describes the concept behind any antenna length… and somehow you tried to correct it by picking one length and describing why it won’t work for a specific design?

This is a really negative approach to introduce concepts of antenna design limitations to the conversation.

> …seems we are both wrong.

If it makes you feel better to view an approximate number as wrong, then enjoy it. This is the internet after all.

You are welcome to have opinions, but arguing about range shortcomings without very specific parameters is pointless. I am traveling down the Texas coastal region today and regularly have 5-10 mile unobstructed line of sight - even a modest monopole antenna will outperform your claims in this area.

> And a full wavelength in the 11 meter band is 32.125 feet not 40.

If you want to be more exact about full wave length in an effort correct someone, then you moght consider explaining how you arrived at “32.125 ft”

CB is 26.965 Mhz - 27.405 Mhz. Which ranges from 36.465 ft to 35.879 ft for a full wave.

Your 32.125 ft would be appropriate for ~30.6m Mhz.

Not that the correcting for exact length adds anything to my comment above, or the one above it……. but whatever. Enjoy yourself.

Bigger antenna helps the most on improving the signal, where larger signal to noise ratio (snr) is the goal. The only real question for your antenna is in choosing which fraction of a wave (1/4, 18, etc) you can live with for antenna length to get the best performance without vehicle operation problems.

Radio label says 4 watt transmit, so with a reasonable antenna and terrain, 10-15 miles would be normal.

Antennas are generally full wave, or a precise fraction of a wave for the frequency. With CB radio full wave requiring a ~40 antenna, a 1/4 wave (10ft) or 1/8 wave (5ft) antenna will be most practical with high performance.