ACR / Nauticast Technical Information

Default MMSI Settings

We have received reports from some administrations who monitor Class A AIS messages that some of the ACR / Nauticast AIS systems transmit a default MMSI (1193046).

Causes

• User fails to enter an MMSI when system is installed.

• MMSI reverts to default value when external power is lost and the internal memory backup battery becomes discharged.

      Corrective Actions

• Users are reminded to check operation of their AIS to assure that an MMSI has been correctly installed in the AIS.

• Users can check for condition of internal memory backup battery periodically as follows:

  • With AIS powered up, check that proper MMSI is entered into the AIS system.

  • Remove power from the AIS system for approximately 2 minutes.

  • Apply power to the system and check that the correct MMSI is present.

  • If step 3) shows default MMSI (1193046), the internal memory backup battery is probably discharged and must be serviced.

AIS TRANSPONDERS
How to Check and Change your MMSI  Numbers.

• Select from the Main Menu “Service Configuration”. Menu is SERVICE password protected with default password “NAUT”. Enter your Service Password when prompted. Use the up and down arrows on keypad to select “Change MMSI / IMO” than press M5 “Select” or “by pressing number 3 on the keypad.

• Input your MMSI number and press Save to store data. The unit will reboot itself after pressing Save.

• Power unit off and on and verify that the unit reboots with the correct MMSI.  If not, see step 4. above.