🔍 Key Concepts

• NAVTEX message categories and what type of information each letter (A, B, etc.) carries • Which NAVTEX categories are considered vital safety information and are therefore always printed or displayed • The difference between navigational warnings and weather warnings in terms of operational safety

💭 Think About

• Among the listed categories, which contain information that is so critical to safety that it must never be filtered out, even if the receiver allows rejection of some categories? • Think about which types of warnings (distress/SAR, navigation, weather) are considered part of Maritime Safety Information (MSI) that should always be received. • Ask yourself: Which of these categories would directly affect the immediate safe navigation of the vessel and risk of grounding or collision if missed?

✅ Before You Answer

• Look up which letter category is assigned to navigational warnings in the NAVTEX system. • Confirm which categories are mandatory to receive (cannot be suppressed) versus which the receiver may allow the operator to deselect. • Verify which of the answer choices refers specifically to routine navigational warnings rather than general labels like “SAR and distress” or “weather warnings.”