Mobile marine radio service (shortwave)

Mobile marine radio service (shortwave)
Frequency range	4000-27500 kHz
Range	worldwide
Emergency / calling frequency	4125 kHz ; 6215 kHz ; 8291 kHz ; 12290 kHz ; 16420 kHz
Emergency / Call Frequency (Telex)	4177.5 kHz ; 6268.0 kHz ; 8376.0 kHz ; 12520.0 kHz ; 16895 kHz
DSC alarm frequency (Emergency / Urgency / Security)	4207.5 kHz ; 6312.0 kHz ; 8414.5 kHz ; 12577.0 kHz ; 16804.5 kHz
Necessary radio operating certificate
Commercial shipping	General Operator's Certificate
Recreational boating	Long Range Certificate

The mobile marine radio service on shortwave is part of the mobile marine radio service that is intended exclusively for radio communications over shortwave .

Range

Radiation of a near-surface ground wave and a sky wave reflected on the ionosphere (with multi-hop)

Intercontinental ranges can be achieved in the mobile marine radio service on shortwave. On the other hand , so-called dead zones , in which reception is not possible, occur, especially in relative proximity to the transmitter, adjacent to the range of the bump .

Usage today

With the advent of the mobile marine radio service via satellites , the importance of the marine radio service on shortwave has declined sharply. Despite various radio services via satellites, above the 70th parallel north and 70th parallel south, only shortwave is permitted as a marine radio service to this day.

Individual evidence

↑ General allocation of frequencies for mobile radio applications for maritime and inland waterway radio. (PDF) Federal Network Agency , March 15, 2017, accessed on January 25, 2020 .

[allgemeinzuteilung-1] General allocation of frequencies for mobile radio applications for maritime and inland waterway radio. (PDF) Federal Network Agency , March 15, 2017, accessed on January 25, 2020 .