How to fix depth indication not appearing on Furuno Plotter?
- GGary WellsSep 8, 2025
To resolve the issue of the depth indication not appearing on the screen of your Furuno Plotter, adjust the bottom level HF/LF.

How to fix depth indication not appearing on Furuno Plotter?
To resolve the issue of the depth indication not appearing on the screen of your Furuno Plotter, adjust the bottom level HF/LF.
What to do if the touch screen on my Furuno Plotter is not responding?
If the touch screen on your Furuno Plotter isn't responding, try these steps: 1. Press the power key and check that [Touch Screen] in the [Brilliance] pop-up menu is set to [ON]. 2. Turn the power off, then on again. If the problem persists, contact your local dealer for service.
What to do if Furuno GP-1871F power is on, but nothing appears on the screen?
If the power is on but nothing appears on the screen of your Furuno Plotter, try the following: * Press the power button several times to adjust the brilliance. * Check if the unit is plugged into the power source.
Why is the picture on my Furuno GP-1871F Plotter not updated or freezing?
If the picture on your Furuno Plotter is not updated or freezes, check for obstructions between the antenna and the display unit. If the picture has frozen, turn the power off and on again.
Why do marks and characters appear, but no picture appears on my Furuno GP-1871F Plotter?
If marks and characters appear on your fish finder display but no picture appears on your Furuno Plotter, check if the transducer cable is tightly connected.
Why does the picture appear but the zero line does not appear on my Furuno Plotter?
If the picture appears but the zero line does not appear on your Furuno Plotter, the picture may be shifted. Check the shift setting. Also, check if the draft setting ([Settings] => [Fish Finder] => [Sensor Setup]) is zero or higher.
How to plot own ship track on Furuno Plotter?
If the own ship track is not plotted on your Furuno Plotter, check if [Tracks Disp] is turned on in the layered menu.
Why is the position not fixed on my Furuno GP-1871F?
Check for interfering objects near the Furuno Plotter display unit that might be blocking reception, if position is not fixed.
Why does Furuno GP-1871F Plotter go into stand-by after tapping the [TX] icon?
If you tapped the [TX] icon to transmit and the "TX screen" appears momentarily, but the radar soon goes into stand-by on your Furuno Plotter, the overload protection has activated. To restore normal operation, turn off all equipment in the network, wait a few seconds, then turn on all the equipment.
How to fix poor discrimination in range on Furuno Plotter?
To address poor discrimination in range on your Furuno Plotter, adjust the rain control.
Instructions for powering the unit on and off.
Adjust screen brightness and color palette settings.
Manage and customize the unit's home screen layouts and pages.
Explanation of different menu types: slide-out, layered, pop up, and settings.
Display and customize navigational data in on-screen data boxes.
Mark man overboard position and create an automatic route.
Connect to wireless networks for software and weather updates.
Introduction to the plotter screen layout and navigation features.
Choose between Vector, Shaded Relief, Satellite, and Raster chart types.
Adjust the chart zoom level using the slider or pinch gestures.
Measure bearing, range, and time between two points on the chart.
View detailed information for C-MAP chart objects and features.
Overlay radar echoes onto the plotter display.
Control NAVpilot autopilot features from the GP-1x71F.
Set the autopilot as the navigation method for routes.
Overlay weather forecast information onto the 2D plotter screen.
Check satellite signal strength and position fix accuracy.
Start and stop the recording of the boat's track data.
Methods for deleting individual tracks, sections, or all tracks.
Remove individual points from the screen or the Points List.
Create temporary quick routes or save planned routes with waypoints.
Automatically construct routes considering safety values like depth and height.
Methods for deleting individual routes or all routes.
Select a route from the screen or list and begin navigation.
Overview of the fish finder screen elements and data.
Configure the connected transducer for optimal fish finding.
Analyze and display seabed composition (rock, gravel, sand, mud).
Utilize automatic adjustments for gain, clutter, TVG, and echo offset.
Manually adjust the transducer sensitivity for optimal echo display.
Measure and tag fish length with symbols scaled to length.
Turn on and configure ACCU-FISH™ display settings and information.
Improve echo resolution for better fish detection near the seabed.
Set up alarms for echo strength, schools, fish size, and seabed composition.
Set an alarm for fish detected within a specific range of the seabed.
Introduction to the radar screen layout and navigation features.
Minimize noise from rain or snow using the Auto Rain feature.
Estimate target distance and bearing using range rings or EBL/VRM.
Set up zones to receive alerts when targets enter or leave a preset area.
Set alarms for Closest Point of Approach (CPA) and Time to CPA (TCPA).
Information on DSC calls and position requests received via VHF.
View vessel data from sensors displayed in graphic or digital formats.
Configure split screen windows to show multiple instrument displays.
System alerts and messages issued when specific conditions are met.
Configure alerts for grounding, depth, anchor drift, and XTD.
Alert when the seabed is within a preset depth range.
Alert when the vessel drifts beyond the preset anchor range.
Alert when off course by more than the preset distance.
Set alerts for fuel, water, and oil levels based on tank percentage.
Lists of general, AIS/DSC, engine, system error, and informative notifications.
Manage data like routes, points, tracks, and settings on a microSD card.
Find chart information like ports, tide stations, and points.