Vhf dsc frequency. Jan 22, 2025 · Global Maritime Distress and Safety System's Digital Selective Calling (GMDSS-DSC) is a maritime communication protocol intended to initiate ship-to-ship, ship-to-shore and shore-to-ship radiotelephone and MF/HF radiotelex calls. The frequencies 161. 975 MHz (VHF-CH AIS 1) and 162. Section-A: VHF-DSC Equipment & Operation: Key Topic-4: Receiver Faults-1: 4A1 What condition may prevent a VHF radio receiver from staying tuned to the desired channel? The local oscillator frequency is beating against the incoming signal to produce an Intermediate Frequency (IF). Coast Guard offers VHF and MF/HF radiotelephone service to mariners as part of the Global Maritime Distress and Safety System. DSC Routine Frequencies These frequencies are used for non-emergency communication and operational coordination: VHF Band: Channel 70 for both ship and shore, using G2B emission at 25 W. . HF6: Ship 6331 kHz, Shore 6312. 5 kHz. 2 182 kHz on MF, channel 16 on VHF, while waiting for the DSC distress acknowledgment. Jan 20, 2015 · The U. This service, called digital selective calling (DSC), allows mariners to instantly send an automatically formatted distress alert to the Coast Guard or other rescue authority anywhere in the world. 1 MHz is used exclusively by satellite EPIRBs (emergency position indicating radio beacons) in the Earth-to-space direction. e. 025 MHz (VHF-CH AIS 2) are used for AIS search and rescue transmitters (AIS-SART) in search and rescue operations. The frequency band 406-406. B. S. MF Band: Ship: 2177 kHz Shore: 2189. Digital selective calling (DSC) is a standard for transmitting predefined digital messages via the medium-frequency (MF), high-frequency (HF) and very-high-frequency (VHF) maritime radio systems. 5 kHz Emission: F1B/J2B Power: 400 W HF Bands: HF4: Ship 4219. 3Transmit the DSC distress alert 5Prepare for the subsequent distress traffic by tuning the Ship’s Antennas Systems and Radio Wave Propagation transmitter and the radiotelephony receiver to the distress traffic channel in the same band, i. 5 kHz, Shore 4208 kHz. prgra efgkyu eiljmp skdwaclo wqsi wsxz pbcgtds dcxyv gqcx dorhqkm