My Garmin 498c sonar is on life-support.
Looking for some sonar advice. Because, after a couple years of marginal performance (especially deep water) my Garmin 498c sonar is finally giving it up. The GPS works great. But absolutely no sonar performance over 250 ft. Marginal over 150ft. I'm using a dual frequency transducer and both 200k and 50k are failing equally. I am going to try a new transducer and see.
I am also looking at upgrading to the Garmin 740s. Does anyone have any comments or opinions on the 740s? Any opinions on other DEEP water sonar units?
Thanks in advance.
If you decide to replace it, have a look at the Lawrence Elite 5. I'm about 10 for ten with guys who watch mine going out and buying their own. It's an amazing machine on all counts.
I'll put a plug in fro the Raymarine 57D.. Pretty powerful machine for the price tag.
I upgraded to the Garmin 740S with radar from West Marine last year, will work with any Garmin transducer, so far so good, it does what it says it will.
07 Ocean Pro 220 ET HT
Garmin 740S, GMR 18 HD
Airmar TM 260-MM