What causes Raymarine Monitor to have problematic depth readings or sonar image?
- EElizabeth HamptonAug 22, 2025
Problematic depth readings or sonar images on your Raymarine Monitor can stem from several causes. Start by checking the sounder presets, gain, and frequency settings, as they may be inappropriate for the current conditions. Inspect the power supply voltage, as a low voltage can affect the unit's transmitting power. Ensure all cables (power, transducer, etc.) are properly connected and undamaged. Check that the transducer is correctly mounted, clean, and within 10° of vertical. If you have a transom-mount transducer, make sure it hasn’t been kicked up. Adjust scroll speed.