This program is designed to receive weather reports, navigational warnings and weather charts transmitted in RTTY, NAVTEX and HF-FAX (WEFAX) modes on longwave and shortwave bands. Can decode GMDSS DSC (HF and VHF) messages. Can also save NOAA Weather Radio SAME voice messages and them digital headers. Additional hardware is not required - your need only receiver and computer with a sound card. Shareware.