It is highly unlikely the USB port on the GPS is useful for anything other than interfacing with a computer to exchange data.
I have interfaced my Sony backup monitor with my laptop S-Video output, but the resolution of the monitor is pretty poor.
We use a laptop running CoPilot 10 for navigation - pictures on the RV pages of our website.
Welcome to the forum!
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--John
2005 Horizon 40AD, 2005 Jeep Liberty CRD
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