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Common-mistake trap: an operator deselects all NAVTEX messages except 'D — SAR' to reduce clutter. What is wrong?
A
Nothing
B
Even if allowed filtering is applied, categories A (nav warnings), B (meteo warnings), D (SAR), L (additional nav warnings), plus tsunami/piracy, must remain selected — and in any case the ship still needs B for weather and A for navigational safety
C
Only A is mandatory
D
Filtering is forbidden entirely