GMDSS: Element 7

1. A Error correction in HF BFEC MSI broadcasts, SFEC NAVTEX broadcasts and two-way ARQ exchanges.
2. B Error correction in SFEC NAVTEX broadcasts, HF SFEC MSI broadcasts and two-way ARQ exchanges.
3. C Error correction in BFEC NAVTEX broadcasts, HF BFEC MSI broadcasts and one-way ARQ broadcasts.
4. D Error correction in HF BFEC MSI broadcasts, NAVTEX broadcasts and two-way ARQ exchanges.

Tip: press A-D to answer