GPSDECODE(1) GPSD Documentation GPSDECODE(1) (NAME) gpsdecode - GPS RTCM AIS (SYNOPSIS) gpsdecode [OPTIONS] gpsdecode -h gpsdecode -V (DESCRIPTION) gpsdecode (batch-mode) NMEA GPS AIS (differential-correction) . JSON . JSON gpsd gpsd . GPSD . NMEA AIVDM ( NMEA AIS ) RTCM2 GPS ( SiRF) . gpsd(8) . nc(1) AIS AIS RTCM RTCM NTRIP . (OPTIONS) -?, -h, --help . -c, --json AIS (pipe) ASCII. AIS . (-u ). ASCII . -d, --decode . . -D LVL, --debug LVL LVL. . -e, --encode JSON JSON . JSON . -j, --json JSON ( ). -m, --minlength ( comment). GPSD . -n, --nmea -NME0183 . -s, --split24 AIS . -t TYPES, --types TYPES . AIS RTCM2 RTCM3 . ( GPS) . -u, --unsscaled AIS (float) . (lossless) . -v, --verbose . -V, --version . AIS DSV (AIS DSV FORMAT) -c --ais (payload) AIS (pipe) . ISO8601 ( Z Zulu/UTC ) TDMA ( "0x"). (regional-authority) ( "0x"). . (EXIT STATUS) 0 . 1 . (SEE ALSO) gpsd(8), gps(1) (RESOURCES) : (COPYRIGHT) GPSD (Copyright 2013 by the GPSD project) SPDX-License-Identifier: BSD-2-clause (AUTHORS) Eric S. Raymond GPSD, Version 3.27.5 2025-11-04 GPSDECODE(1)