The purpose of "parity" in SITOR (NBDP)...

Question 1 / 27070j6KyaYm0VGVq2iPxnSPE

Question 1 of 27070j6KyaYm0VGVq2iPxnSPE

The purpose of "parity" in SITOR (NBDP) communications is?

Question 1 of 27070

The purpose of "parity" in SITOR (NBDP) communications is?

🔍 Key Concepts

• SITOR (NBDP) has two main modes: ARQ (Automatic Repeat reQuest) and FEC (Forward Error Correction) • Difference between BFEC (Broadcast FEC) / HF MSI vs SFEC (Simple FEC) / NAVTEX • What parity bits actually do in digital communications (detect or correct errors?)

💭 Think About

• First, recall which services (NAVTEX, HF MSI, ARQ) use FEC versus ARQ in SITOR. • Think about whether parity is used the same way in all SITOR modes, or if its role is specific to certain combinations of FEC/ARQ. • Consider which answer choices mix up BFEC vs SFEC, and which pair correctly with NAVTEX and HF MSI services.

✅ Before You Answer

• Verify which mode NAVTEX uses: SFEC or BFEC? • Verify which mode HF MSI broadcasts use: BFEC or SFEC? • Confirm that two-way exchanges use ARQ and one-way broadcasts use FEC, then match this to the choices.

Question 1 of 27070

The purpose of "parity" in SITOR (NBDP) communications is?

Error correction in HF BFEC MSI broadcasts, SFEC NAVTEX broadcasts and two-way ARQ exchanges.

Error correction in SFEC NAVTEX broadcasts, HF SFEC MSI broadcasts and two-way ARQ exchanges.

Error correction in BFEC NAVTEX broadcasts, HF BFEC MSI broadcasts and one-way ARQ broadcasts.

Error correction in HF BFEC MSI broadcasts, NAVTEX broadcasts and two-way ARQ exchanges.

Question 1 / 27070j6KyaYm0VGVq2iPxnSPE

Question 1 of 27070j6KyaYm0VGVq2iPxnSPE

The purpose of "parity" in SITOR (NBDP) communications is?

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Question 1 of 27070

The purpose of "parity" in SITOR (NBDP) communications is?