Larry L wrote:

I do what you suggest but they travel through your area fast and you want to
get as many tries to match their rise rhythm / next rise spot as possible as
they slice across your circle of possibilities.

This is not the solution you asked for (the technological one),
but it's motivated by my own conviction that at this stage in my
life I would never consider buying more gear to meet a situation
I only encountered "3 to 4 days / year."

Me, I'd just, in my mind, decrease the radius of my "circle of
possibilities." Fish 40 feet away, all right (hell, I'm sitting
in a kickboat for God's sake....). Fish 70 feet away might as
well be in Idaho for all I care. If nothing is rising in, or
moving toward my small world, I sit and watch the larger one....

- JR