In NAVTEX service, VITAL warnings will()by transmitting station.
The principal advantage of NAVTEX radio warnings is that().
International Navtex service is().
The NAVTEX receiver can be mounted on().
The difference between international and national Navtex Service is limited to().
What language does International NAVTEX use?()
In NAVTEX service, the subject indicate character B means().
The difference between international and national Navtex Service is limited to().
International SafetyNet and Navtex Services promulgate MSI by means of().
NAVTEX工作模式为()。