Gmdss : Element 7 - 521/600
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| Which of the following statements concerning SITOR communications is true? |
| A) FEC transmissions are made in data groups consisting of three-character blocks. |
| B) FEC transmissions require a "phasing" or "handshaking" process prior to character transmission. |
| C) FEC transmissions rely upon an error correction technique, which transmits each character twice. |
| D) FEC transmissions rely upon parity and "repeat requests" to ensure error correction. |
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