RookiewithaRobalo

I recently purchased a Robalo with a Simrad GO7 installed. I am looking for map cards that include the Mississippi Sound. I have been checking out the C-Map N+. I can’t find a CMOR that covers that area. I’d like to have a chart with detailed topo if the sea floor similar to the CMOR. Does Navionics make one that covers that area? If so, which would ya’ll recommend? Does anyone have experience with another brand that may be better? Thanks!