（ ）are utilized to relay Enhanced Group Calls
A: COSPAS satellites.
B: HF SITOR shore stations
C: NAVTEX shore stations
D: Inmarsat satellites.
A: COSPAS satellites.
B: HF SITOR shore stations
C: NAVTEX shore stations
D: Inmarsat satellites.
举一反三
- 34. Cospas-Sarsat comprises a several near polar orbiting satellites and一． A: a network of land based earth stations B: several coast stations C: an earth station D: some RCCs
- ______ is sea area A2. A: An area within coverage of INMARSAT geostationary satellites B: An area, excluding sea area A1, within coverage of Medium Frequency (MF) coastal radio stations in which continuous DSC alerting is available C: An area within coverage of VHF coast radio stations in which continuous DSC alerting is available D: The extreme polar regions
- CATEGORY A EPIRB’s transmit on frequencies that are monitored by（）. A: orbiting satellites in space B: commercial radio stations C: private，commercial，and military aircraft D: ordinary radio statio
- 66. DSC distress alert should direct to（ ）ln vicinity。 A: all stations B: coast stations C: ship stations nearby D: group of specified stations
- Public television stations are different form commercial stations _____.