I remember reading one day that there are add on charts that contain detail information about the Gulf of Mexico - drilling platforms, wrecks, reefs, etc.

A friend and I are planning a trip to the coast and would like to have access to good navigation information to locate likely fishing spots.

Specifically, we plan on going to Freeport, TX and going offshore, probably in the 25-30 mile range

I have the Navionics Platinum South card and he is running an HB 1198.

Anyone have any info on this?

Thanks in advance for your help.

I think you need the Navionics Gold map card. Never used one so I have no clue what they show.

Im interested as well. I posted the question in the off shore section but no info yet.

Check out the Platinum + card from NAvionics....
http://www.navionics.com/en/platinum-plus


It has a ton of info, with all Gold features plus: 3D and Satellite Overlay, Panoramic Port Pictures, dynamic Tides & Currents and much more!
https://www.youtube.com/watch?v=YRx5gZIFLJk&feature=youtu.be

You can also check out the WEBAPP for all of the mapping for your area....for FREE!!

http://webapp.navionics.com/?lang=en#@7&key=%7BnlpDfne_Q

I've used the Gold Card in NW fl, Miss, & La, showes great detail, reck, reefs & ect., no problems