What statement is true regarding the control the operator can exercise over the NAVTEX receiver's operation?

Correct Answer: Option B — The operator can set the unit to reject all messages except navigation, weather and sea warnings, and search and rescue messages.

NAVTEX receivers are designed to prioritize safety. While operators can filter various message types, the system prevents the rejection of critical categories like navigational warnings, weather alerts, and SAR information. This ensures that the vessel always receives vital safety data, fulfilling the core requirements of the GMDSS.