Connecting to an AIS Receiver
An AIS (Automatic Identification System) receiver or RADAR can be connected to your Mac. The NMEA data can come through a serial port such as the Keyspan High Speed Serial Adapter.
Select menu item "Connect" in the "AIS/RADAR" menu. If the Settings drawer is not open select the "Settings" button to open it. In the Settings drawer the correct serial port and rate can be selected OR select "Use GPS Port" to use the same serial port/rate the GPS is connected to OR select "Use Instruments Port" to use the same serial port/rate the Instruments are connected to.
Note: If "Simulate"
is selected on the "GPS" menu, simulated RADAR values
will be displayed on the AIS/RADAR panel.
If the AIS receiver or RADAR is properly connected and is transmitting NMEA data then the AIS panel will display the received data. A good connection will be indicated by a GREEN icon next to the "Settings" button on the AIS/RADAR panel. If a RED icon is seen it most likely indicates the rate selected in the Settings drawer is not the same as the AIS receiver/RADAR or the AIS receiver/RADAR is not transmitting NMEA. If the icon shows only YELLOW it indicates NMEA data is being received, but it cannot be interpreted. Symptoms of this include incorrect rate or an AIS receiver or RADAR is not transmitting the NMEA data that GPSNavX™ can interpret. Note: Most AIS receivers only transmit NMEA data when there is AIS data received so icon may stay RED or YELLOW until some AIS data is received. Note: RADAR requires the GPS panel be opened (via menu item "Connect" on the "GPS" menu) and a current position is transmitted from the connected GPS.
Select the "Transparent" checkbox to make the AIS/RADAR panel semi-transparent.
The "Monitor" button will open/close a drawer that displays the raw NMEA data. Use the "Start" button to enable output and the "Clear" button to erase the contents. If the AIS receiver is properly connected you will see a stream of NMEA data displayed when the "Start" button is selected.
The "More Info..." button will display the call sign, mmsi, position, destination and closest point of approach of the selected target if available.
Select the "Connect
at Startup" checkbox in the Preferences window to have the AIS/RADAR
panel automatically open when GPSNavX™ is started.
The positions/targets received from the AIS receiver or RADAR will be plotted on the open chart if "Show Underway" or "Show Stationary" is enabled on the "AIS/RADAR" menu. Any position that is not updated or lost within five minutes will have it's fields and position icon turned gray to note it's expiration. Any position that is not updated within 15 minutes will be removed. AIS Targets will be plotted in two sizes: Small for vessels less then 200', Large for vessels of greater length.
[command] click on a position/target name on the chart and it will be selected in the AIS/RADAR panel.
Use the "Proximity Alarm" on the "AIS/RADAR" menu to enable an alarm to activate when any position/target is within "AIS Proximity" distance set in the GPSNavX™ preferences.