GMDSS: Element 7

1. A It can use compatible terrestrial cellular phone networks if available.
2. B Dual use technology permits Inmarsat satellites as well as Iridium satellites to be used.
3. C Dual use technology permits terrestrial cellular phone calls and Inmarsat calls.
4. D It can make calls only through the Iridium satellite system.

Tip: press A-D to answer