Garmin GPSMAP 8700 Installation Instructions Manual page 16

Third-Party Touchscreen Connection Considerations
When connecting a third-party touchscreen to view and control the GPSMAP 8700 device, you must observe
these considerations.
• The video data is sent over the HDMI connection.
• The touch data is sent over the USB connection.
Devices
Item Device
GPSMAP chartplotter
Third-party touchscreen monitor
Connections
From
Chartplotter's HDMI OUT port
Monitor's USB port
NOTE: If the monitor is not a touchscreen, you should install a GRID remote control (not a GRID 20 remote
control).
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To
Monitor's HDMI IN port
Chartplotter's USB HOST port
Cable
Garmin HDMI Cable
Garmin OTG Adapter Cable