I buddied up with a nice fellow last night, but, alas, we had to call the dive. The transmitter on his high-tech fancy, expensive, do everything, wireless, magical mystical computer didn't seem to like the 25 degree air temp and wouldn't get going. We stood in three feet of cold water for about fifteen mins while he pushed buttons and stared at it and moved it up next to the sending unit and stared at it some more and pushed some more buttons. He kept putting his arm back behind him next to the sender and - because he couldn't see it - asked me to look at it and see if it was coming on, but it just kept saying, "setup".
Our other two friends said they had a nice dive.
Oh well...