There are several choices for the Ultrex 80.
US2 transducer
MDI transducer
MSI transducer--not available yet
iPilot LINK
Then the shaft lengths.
DO you know differences in these? I really dont and I have not even begun to think about linking it to my old 1197 or if its even possible. Shaft will be standard 45
I understand the Ultrex to be spot anchor more or less, or and ability to work a shoreline on a jog setting. Seems to take place of an anchor and power poles,,and without the extra added weight. I think I drift out of position a lot of times when unhooking or fighting fish.
US2 means Universal and works with several brands using 83/200 kHz 2D sonar ONLY like your 1197 has.
MDI means MEGA Down Imaging and does HW CHIRP 2D sonar and 455/800/1200 kHz Down Imaging with Humminbird units ONLY
MSI means MEGA Side Imaging and does HW CHIRP 2D sonar and 455/800/1200 kHz Down Imaging and Side Imaging with Humminbird units ONLY.
iPilot LINK is an Ethernet connection to Humminbird units ONLY that give iPilot more memory for Spotlocks (waypoints) iTracks, and the ability to follow Lakemaster HD map contour lines (Follow-the-Contour).