I wouldnt be surprised if Navionics changed their API when they realized it allowed people to create geospatially referenced images (essentially allowing people to create bootleg Navionics cards - some people might call that theft)

7.2.2 Restrictions against Data Export or Copying.

(a) No Unauthorized Copying, Modification, Creation of Derivative Works, or Display of the Content. You must not copy, translate, modify, or create a derivative work (including creating or contributing to a database) of, or publicly display any Content or any part thereof except as explicitly permitted under these Terms.

(b) No Pre-Fetching, Caching, or Storage of Content. You must not pre-fetch, cache, or store any Content, except that you may store: (i) limited amounts of Content for the purpose of improving the performance of your Maps API Implementation if you do so temporarily, securely, and in a manner that does not permit use of the Content outside of the Service; and (ii) any content identifier or key that the Maps APIs Documentation specifically permits you to store.

(c) With reference to the restrictions described in a) and b) above, You cannot allow the End User accessing your Maps API Implementation to print and geo-reference our Content in a way that would generate a map usable for navigation.

Excuse my ignorance,
But, would this effect one's ability to create a trail or waypoint in google earth, and then overlay on top of a Navionics image on a Lowrance unit.

I'm guessing that it wouldn't, since the trail or waypoint is added to the Lowrance unit hard drive and not the Navionics chip. My concern would be some sort of compatibility issue.

Thank you

Excuse my ignorance,
But, would this effect one's ability to create a trail or waypoint in google earth, and then overlay on top of a Navionics image on a Lowrance unit.

I'm guessing that it wouldn't, since the trail or waypoint is added to the Lowrance unit hard drive and not the Navionics chip. My concern would be some sort of compatibility issue.

Thank you