How is a NAVTEX receiver programmed to...

How is a NAVTEX receiver programmed to reject certain messages?

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🔍 Key Concepts

• NAVTEX message categories (single-letter A–Z identifiers for types of information, like navigational warnings, weather, etc.) • Difference between rejecting messages from a station vs rejecting certain categories of messages • How a NAVTEX receiver’s programming menu usually lets you enable/disable categories and/or stations

💭 Think About

• Look at which options refer to turning off an entire transmitting station versus only turning off types of messages regardless of station. • Think about the format of a NAVTEX message header: what parts identify the station, and what parts identify the category? Which of those is normally user-selectable for filtering? • Consider which answer choices mention something that is a standard NAVTEX feature (per manuals and GMDSS practice) versus something that sounds like a feature of a different system, like SELCAL on MF/HF or INMARSAT.

✅ Before You Answer

• Verify which part of a NAVTEX message uses a single letter (A–Z) and what that letter represents. • Verify whether SELCAL is actually used for NAVTEX or for other GMDSS equipment like MF/HF-DSC or INMARSAT. • Check NAVTEX receiver instructions: do you normally program by station ID numbers, by message categories, or both—and which is emphasized for rejecting certain kinds of messages (e.g., routine vs urgent)?

🔍 Key Concepts

💭 Think About

✅ Before You Answer