What determines whether a NAVTEX receiver does not print a particular type of message content?

A NAVTEX receiver is designed to collect and print maritime safety information, including weather updates and navigational warnings. However, operators have the ability to program the receiver to ignore certain types of messages based on specific criteria.

When it comes to content rejection, the critical factor is the subject indicator associated with the message. Each NAVTEX message is tagged with a subject indicator that specifies its content type, such as weather forecasts, navigational warnings, or other essential information. If this subject indicator aligns with a setting programmed by the operator to reject that type of message, the NAVTEX receiver will not print it. This programming offers flexibility to operators seeking to filter out non-essential information or data that may not be relevant to their operations.

The other options may contribute to various limitations or functionalities of the NAVTEX system but do not directly relate to the programmed content rejection process:

• Receiving messages from non-registered sources, for example, might stop messages from being printed but does not involve operator programming related to subject indicators.

• Signal strength issues can affect whether a message is received at all, rather than whether it is printed.

• An incorrect message format would result in how messages are processed but does not pertain to the specific rejection settings pre-defined