At the start of the new year I will be starting my cavern class with Jeff Bauer. Since i decided to do this, the girlfriend has been very worried and concerned since a good friend of her's had her father die in a cave last year (he was an OW instructor with no cave training.) I assume many of you have spouses who do not agree with the activity. How have you minimized the worry and concern for them?
The mere fact that you're seeking the overhead training that her friend's dad lacked should help.
Take it slow and see where you go after cavern training, and use what you learn to help assuage her fears. This worked for me...
My wife was afraid when I wanted to get my OW cert, but relaxed when she saw how in-depth the training was. (OK, ok, but it WAS more in depth than she had assumed it would be. And I DID have the benefit of a very well-conducted OW course.)
Then she was worried when I told her I was getting my AOW, until I told her how non-advanced it was.
When I started wreck training/diving she had visions of "Last Dive" until she got to see what the training was about and understood the "predominantly DIR" approach I follow.
Meeting some of the folks I dive with and the folks at the shop I train with helped too when she saw how rigorous and safety-oriented they are.
When I told her I was doing cavern course she actually like the idea that I was taking an even more rigorous, formal approach to diving in the overhead environment.
I've now completed Tech 1, with Tech 2 following in the spring, and my wife is relatively comfortable with me doing deeper, longer, deco dives.
At this point, when I finally move on to Full Cave the only concern she'll have should be the travel cost and time!