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Voyager III System Configuration
the system, such as radar, GPS, or independent input ports. The Voyager III
connects to the other equipment via a serial cable or a direct connection.
The NMEA protocol allows the camera to automatically point toward vessels and
other objects that show up on the display and to track their movement.
Note: The system is also able to track targets that are manually identified by an
operator. See "Using Voyager III Tracking" on page 33 for details.
The Voyager III can receive three types of NMEA messages.
• Radar Cursor Tracking, which is implemented using the NMEA Radar System
Data (RSD) sentence format
• Slew to Waypoint, which uses the NMEA Bearing and Distance to Waypoint,
Great Circle (BWC) sentence format
• Radar Tracking, which uses the NMEA Tracked Target Message (TTM)
sentence format
Even though you can only choose three types of messages to enable through the
NMEA interface, the Voyager III uses additional messages to perform the
calculations needed to respond to these three. If your system is not responding
as expected, verify that the NMEA device sending messages is sending the
following additional message types:
HDT
GGA
GLL
VHW
OSD
TLL
Any combination or all three messages can be enabled; when more than one
type is enabled, the system processes RSD first, then BWC, and finally TTM. For
example, if the unit is listening to BWC or TTM messages and looking at a
particular target and it receives an RSD message, it waits until the end of the
dwell time and then move on to the RSD message, ignoring all other input.
Note: Using the joystick to pan or tilt the camera always takes priority over
processing of an NMEA message. The next NMEA message will be processed
after the system waits the target dwell time following the joystick movement.
Each message type has a unique icon associated with it. Depending on Icon
Display Mode, these icons either always display or display momentarily when a
message is received. In both cases, they flash on and off when the message is
received.
46
Heading, True
Global Positioning System Fix Data
Geographic Position, Latitude/Longitude
Water Speed and Heading
Own Ship Data
Target Latitude and Longitude
432-0005-00-10 Rev 100 — Voyager III Operator's Manual
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