From 3033df1f7ae8e0b874e28173f694b324ceb35dee Mon Sep 17 00:00:00 2001 From: "Gary E. Miller" Date: Thu, 1 Nov 2018 15:17:45 -0700 Subject: www/NMEA: Sort talker ID lists. --- www/NMEA.txt | 32 ++++++++++++++++---------------- 1 file changed, 16 insertions(+), 16 deletions(-) (limited to 'www') diff --git a/www/NMEA.txt b/www/NMEA.txt index 9ced183d..dc6a871e 100644 --- a/www/NMEA.txt +++ b/www/NMEA.txt @@ -277,24 +277,23 @@ the following are well known: .Common talker IDs |================================================================ -|GP | Global Positioning System receiver -|LC | Loran-C receiver -|II | Integrated Instrumentation -|IN | Integrated Navigation -|EC | Electronic Chart Display & Information System (ECDIS) +|BD | BeiDou (China) |CD | Digital Selective Calling (DSC) +|EC | Electronic Chart Display & Information System (ECDIS) |GA | Galileo Positioning System +|GB | BeiDou (China) |GL | GLONASS, according to IEIC 61162-1 |GN | Mixed GPS and GLONASS data, according to IEIC 61162-1 -|GB | BeiDou (China) -|BD | BeiDou (China) +|GP | Global Positioning System receiver +|II | Integrated Instrumentation +|IN | Integrated Navigation +|LC | Loran-C receiver |QZ | QZSS regional GPS augmentation system (Japan) |================================================================ -LC - Loran-C is a marine navigation system run by the U.S. government, -which is planning to shut it down in favor of GPS. Some non-Loran -devices emit GLL but use this talker ID for backward-compatibility -reasons, so it may outlast the actual Loran system. +EC -- ECDIS is a specialized geographical information system intended +to support professional maritime navigation. NMEA talker units +meeting the ECDIS standard use this prefix. Some of these emit GLL. II - II is emitted by the NMEA interfaces of several widely-used lines of marine-navigation electronics. One is the AutoHelm system by @@ -303,10 +302,6 @@ devices. IN -- Some Garmin GPS units use an IN talker ID. -EC -- ECDIS is a specialized geographical information system intended -to support professional maritime navigation. NMEA talker units -meeting the ECDIS standard use this prefix. Some of these emit GLL. - CD -- Modern marine VHF radios use conventions collectively known as Digital Selective Calling (DSC). These radios typically take data from a local position indicating device. This data is used in @@ -320,6 +315,11 @@ LC talker prefix for this purpose. Otherwise they use the CD prefix. A vessel's nav system is likely to have both CD and some other position indicating talker on its bus(es). +LC - Loran-C is a marine navigation system run by the U.S. government, +which is planning to shut it down in favor of GPS. Some non-Loran +devices emit GLL but use this talker ID for backward-compatibility +reasons, so it may outlast the actual Loran system. + Until the U.S. Coast Guard terminated the Omega Navigation System in 1997, another common talker prefix was "OM" for an Omega Navigation System receiver. @@ -347,6 +347,7 @@ for them may be present in the GPSD project. |CX | Communications - Scanning Receiver |DE | DECCA Navigation (obsolete) |DF | Direction Finder +|DM | Velocity Sensor, Speed Log, Water, Magnetic |DU | Duplex repeater station |EC | Electronic Chart Display & Information System (ECDIS) |EP | Emergency Position Indicating Beacon (EPIRB) @@ -372,7 +373,6 @@ for them may be present in the GPSD project. |U# | '#' is a digit 0 ... 9; User Configured |UP | Microprocessor controller |VD | Velocity Sensor, Doppler, other/general -|DM | Velocity Sensor, Speed Log, Water, Magnetic |VW | Velocity Sensor, Speed Log, Water, Mechanical |WI | Weather Instruments |YC | Transducer - Temperature (obsolete) -- cgit v1.2.1