Create BSB files for your KAP sea charts

Tags: Sailing, Charts

Some sea charts are just released as KAP files, without the accompanying BSB file. If you run into problems importing the KAP files, there is a way to generate the BSB files.

For example, these New Zealand maps: are without the BSB files. The KAP files are generated with the MapCal tools ( and the original New Zealand DIR file is also on the website.

From the MapCal site, download the MC2BSBH tool and run it on the directory with the KAP files. A BSB file is generated for every KAP file.

MC2BSBH     chartcal.DIR -e BSB

Normally a BSB file can contain multiple references to KAP files (e.g. detail charts) but I still have to figure that out.