GMDSS Maintainer: Element 9

1. A A removable device to implement Inmarsat digital rights management (DRM).
2. B A non-volatile device to implement high-speed data and other advanced terminal features.
3. C An integrated circuit device that securely stores the Inmarsat identity and an authentication key.
4. D A Read/Write data device that uses x.25 protocol to limit terminal access to authorized users.

Tip: press A-D to answer