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$GPVTG,<1>,T,<2>,M,<3>,N,<4>,K*hh<CR><LF>
<1>
True course over ground, 000 to 359 degrees
(leading zeros will be transmitted)
<2>
Magnetic course over ground, 000 to 359 degrees
(leading zeros will be transmitted)
<3>
Speed over ground, 00.0 to 99.9 knots (leading
zeros will be transmitted)
<4>
Speed over ground, 00.0 to 99.9 kilometers per
hour (leading zeros will be transmitted)
4.2.9 Estimated Error Information ($PGRME
GARMIN proprietary format)
The $PGRME sentence reports estimated position error
information.
$PGRME,<1>,M,<2>,M,<3>,M*hh<CR><LF>
<1>
Estimated horizontal position error (HPE), 0.0 to
9999.9 meters
<2>
Estimated vertical position error (VPE), 0.0 to
9999.9 meters
<3>
Estimated position error (EPE), 0.0 to 9999.9
meters
4.2.10 Status Information ($PGRMT GARMIN propri-
etary format)
The $PGRMT sentence gives information concerning the
status of the GPS 30/30 SL. This sentence is transmitted
once per minute regardless of the selected baud rate.
$PGRMT,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>*hh<CR><LF>
<1>
Product, model and software version, this is a
variable length field. (NOTE: Since the GPS 30/
30 SL utilizes a GPS 20/20 SL sensor board, the
GPS 20/20 SL model description will appear in this
field.)
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