rdstair
I have a 998 with 6.18 installed by HB at the repair service center.
Just completed 5 hours of recording on the lake. So far, so good.
Previous software ( 5.410 ) worked fine for about a hundred hours then took a dump.
DI flashing, SI image unreadable, plus others.
6.18 seems to have corrected it. HB found no problems with unit or transducer.
Fingers are still crossed.