Atlas · HAM net · Worldwide, Atlantic and Caribbean coverage best
Maritime Mobile Service Net
Callsign MMSN. USB (SSB) on 20 m.
Primary14.300 MHz
ModeUSB (SSB)
Verified2026-04
Coverage
Emergency and traffic-handling net for mariners. Relays position reports, weather observations, and emergency traffic between vessels and shore stations.
Schedule
1600–0200 UTC daily. Activated for emergencies outside schedule.
Serves hazard channels
Source
Frequencies and schedules change. Cross-check with the net's own site before keying up.