First...I'm new at this, and I fully expect my bad experience with the Navionics chart plotter to be my fault.
I have a 2021 Barletta LA-25 tritoon and use it on Lake Norman in NC. The boat came with SIMRAD and I bought a Navionics chip and installed it in the SIMRAD. I believe it was the inland lakes southeast version, something like that.
First outing with the new chip and within an hour I ran aground. The chart said I was in 12 ft or water but the sonar said 1.5 ft. Churned up plenty of mud but was able to get out of it without getting wet. Since then I have seen depths on the chart all over the place... saying 4' but depth was actually 18', saying 18' but was 4', etc etc. Most of the time it is close to the sonar reading but most doesn't count, because most of the time I don't want to run aground.
Why is the chart off by so much? Am I possibly not using the correct chip? Any suggestions?
I have a 2021 Barletta LA-25 tritoon and use it on Lake Norman in NC. The boat came with SIMRAD and I bought a Navionics chip and installed it in the SIMRAD. I believe it was the inland lakes southeast version, something like that.
First outing with the new chip and within an hour I ran aground. The chart said I was in 12 ft or water but the sonar said 1.5 ft. Churned up plenty of mud but was able to get out of it without getting wet. Since then I have seen depths on the chart all over the place... saying 4' but depth was actually 18', saying 18' but was 4', etc etc. Most of the time it is close to the sonar reading but most doesn't count, because most of the time I don't want to run aground.
Why is the chart off by so much? Am I possibly not using the correct chip? Any suggestions?