Sorry! Here is an example: In the folder CHARTHDR there is a file labelled M00107S0.HDR. It is 256 bytes. I suspect this is the tool to open another folder labelled M00107SO which contains files with an extension of a letter followed by two numbers. Example: .A01, .A02, etc. These files average 14-40 kb. and are probably the actual charts. There are corresponding sets of folders/files for all of Mexico
, C.A., and part of S.A. All the .HDR files are 256 bytes. Loading these files into Maptech Offshore
Navigator was a matter of simply clicking on the icons.