I got one off Ebay and recently updated the firmware. I transferred the waypoints and trails from my LCX-27C (USR format) to my Mac. Then I used GPSBabel to convert to GPX and transferred to the Endura. When I plug the Endura into the Mac it doesn’t often show up as an external device like it’s supposed to so that was a bit of a hassle. I took it to a small lake last weekend and it worked well and I saw the waypoints and trails as expected.
I have a Navionics Premium North card but I hadn’t tried that since the lake I went to is small and not on the Navionics card. I just plugged the card in now and turned it on but I don’t see the lakes in the Navionics viewer. So I’ll have to investigate a bit.
Be aware you have to use the Navionics Viewer tool to view Navionics maps on the endura. When in that tool, you cannot see or create waypoints or trails. So from that perspective, it’s a big step backwards from my iFinder which works the same as my boat sonar/GPS. On the endura, you cannot see your Navionics map and waypoints/trails at the same time.
I don’t think Lakemaster maps are supported on any Lowrance products, are they?
The user manual (available at lowrance.com) doesn’t say much of anything about loading maps.
John S.