Two Truths
Veteran Member
I have a Simrad electronics package with the B&G Precision 9 solid-state compass (circa 2018). When the system is calibrated it works just fine, and the calibration process (rotating the boat) is simple and quick when you get used to it. Problem is, I find the boat has to be recalibrated every few days. That is, I will calibrate one day, and it holds the heading just fine. But a day or two later, when I turn the system back on, the heading and COG will diverge by up to 10 degrees or so (with no current or wind), and the divergence becomes obvious when I overlay the radar onto the chart. I can do a quick-fix using the calibration offset function, or rotate the boat again if conditions are good. But I wonder why it seems to lose its bearings when sitting unused. Anyone else have similar experiences? Ideas? Is this all my imagination?
(Note: I don't think local magnetic disturbance is an issue, since I turn the system off one day and the readings are accurate, and turn it on again a day or two later in the same location and the readings are off.)
(Note: I don't think local magnetic disturbance is an issue, since I turn the system off one day and the readings are accurate, and turn it on again a day or two later in the same location and the readings are off.)