Her is an extract from fugawi
site looks like they might be bsb
chart. CYC means Caribbean
2011 Edition Charts Now Shipping
These nautical charts of the the US East Coast
are made in the BSB/EAN format from Nautical Publications' (NV.Charts') popular Caribbean Yachting Charts, for use with Fugawi Marine ENC
or other compatible software
US East Coast
and Caribbean Yachting Charts are especially produced by Nautical Publications with the requirements of the yachtsman in mind.
Each set includes both the paper printed map and a companion CD with the electronics BSB
version of the charts.
NEW: Raster charts are also available for direct download from Fugawi X-Traverse for use in select software
If the file extension is .kap they should work ok with OpenCPN