The operator can set the unit to automatically reject any and all categories of messages if the ship desires to not receive them.

Upon entering a coastal area for the first time, the operator enters code KK to indicate "ready to receive NAVTEX".

To reduce the number of messages, the operator can select code 00 to indicate "not in coastal passage".

The operator can set most units to reject all messages except navigation , meteorological warnings , and search and rescue messages. If the unit will reject such messages it may be unsafe to do so.