...
Geocap uses GEOTRANS for geodetic conversion of coordinates. The following statement applies:
The product was developed using GEOTRANS, a product of the National Geospatial-Intelligence Agency (NGA) and U.S. Army Engineering Research and Development Center.
Through GEOTRANS, Geocap can convert datasets between more than 200 Datums, and 32 different projections and coordinate systems. See the full list in the Appendix.
...