190-00879-08 GPS 18x Technical Specifications Rev. BPage 194.2.11 GPS Fix Data Sentence (PGRMF)$PGRMF,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>,<13>,<14>,<15>*hh<1> GPS week number (0 to 1023)<2> GPS seconds (0 to 604799)<3> UTC date of position fix, ddmmyy format<4> UTC time of position fix, hhmmss format for GPS 18x PC/LVC; hhmmss.s format for GPS18x-5Hz<5> GPS leap second count<6> Latitude, ddmm.mmmm format for GPS 18x PC/LVC; ddmm.mmmmm format for GPS 18x-5Hz (leading zeros must be transmitted)<7> Latitude hemisphere, N or S<8> Longitude, dddmm.mmmm format for GPS 18x PC/LVC; dddmm.mmmmm format for GPS18x-5Hz (leading zeros must be transmitted)<9> Longitude hemisphere, E or W<10> Mode, M = Manual, A = Automatic<11> Fix type, 0 = no fix, 1 = 2D fix, 2 = 3D fix<12> Speed over ground, 0 to 1851 kilometers/hour<13> Course over ground, 0 to 359 degrees, true<14> Position dilution of precision, 0 to 9 (rounded to nearest integer value)<15> Time dilution of precision, 0 to 9 (rounded to nearest integer value)4.2.12 Map Datum (PGRMM)The Garmin Proprietary sentence $PGRMM gives the name of the map datum currently in use by the GPS sensor.This information is used by the Garmin MapSource real-time plotting application.$PGRMM,<1>*hh<1> Name of map datum currently in use (variable length field, for example, “WGS 84”)4.2.13 Sensor Status Information (PGRMT)The Garmin Proprietary sentence $PGRMT gives information concerning the status of the GPS sensor. Thissentence is transmitted once per minute regardless of the selected baud rate.$PGRMT,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>*hh<1> Product, model and software version (variable length field, for example, “GPS 18x VER 2.05”)<2> No Effect (This field is not used on this model and is included only for backwards compatibility)<3> No Effect (This field is not used on this model and is included only for backwards compatibility)<4> No Effect (This field is not used on this model and is included only for backwards compatibility)<5> No Effect (This field is not used on this model and is included only for backwards compatibility)<6> No Effect (This field is not used on this model and is included only for backwards compatibility)<7> No Effect (This field is not used on this model and is included only for backwards compatibility)<8> No Effect (This field is not used on this model and is included only for backwards compatibility)<9> No Effect (This field is not used on this model and is included only for backwards compatibility)4.2.14 3D Velocity Information (PGRMV)$PGRMV,<1>,<2>,<3>*hh<1> True east velocity, -514.4 to 514.4 meters/second for GPS 18x PC/LVC; -514.44 to 514.44 for GPS18x-5Hz<2> True north velocity, -514.4 to 514.4 meters/second for GPS 18x PC/LVC; -514.44 to 514.44 for GPS18x-5Hz<3> Up velocity, -999.9 to 999.9 meters/second for GPS 18x PC/LVC; -999.99 to 999.99 for GPS 18x-5Hz
