Operating Instructions and Installation Instructions

ComNav Navigator G2 Installation & Operation Operation

Document PN 29010081 V1.1 - 33 -

Table 4 – Navigation Page Fields Descriptions

Field Description NMEA Message

Source

Heading Heading in units of degrees. True (HDT) or Magnetic (HDM)

depending on the NMEA sentences being received.

HDT, HDM, HDG

COG Course Over Ground. Displayed in Units of degrees. VTG, RMC

SOG Speed Over Ground. Displayed in Units of knots. VTG, RMC

ROT Rate of Turn of the vessel. Displayed in Units degrees per

minute.

ROT

Position Latitude and Longitude of the vessel. Displayed as Degrees and

Minutes.

GGA, GLL, RMC

PDOP Position Dilution of Precision. A measure of the overall position

accuracy.

GSA

HDOP Horizontal Dilution of Precision. A measure of the horizontal

position accuracy.

GGA, GSA

VDOP Vertical Dilution of Precision. A measure of the vertical

position accuracy.

GSA

DGPS Indicate whether Differential Position sensing is Active, and the

age of the DGPS information being used.

GGA

UTC

Time

Universal Coordinated Time. Displayed as hours, minutes and

seconds.

GGA, GLL, RMC,

ZDA

Information Pages

There are three Information pages which can be selected by toggling the INFO button.

The Heading Information page shows detailed heading information including Magnetic

Variation, Bias adjustment and Filter Smoothing.

Figure 18 shows an example of the Heading Information page. Table 5 summarizes the

meaning of each field and where it comes from.