WMO Code Tables

Code Table 0114: AN - Anemometer type

Code Meaning
0 Cup rotor
1 Propeller rotor
2 Wind Observation Through Ambient Noise (WOTAN)
/ Missing value

Code Table 0161

A1
WMO Regional Association areas in which buoy, drilling rig or oil- or gas-production platform has been deployed (1 - Region I; 2 - Region II, etc.)
bw
Sub-area belonging to the area indicated by A1
Code Table 0161

Code Table 0200:

a - Characteristic of pressure tendency during the three hours preceding the time of observation

Code Meaning
0 Increasing, then decreasing; atmospheric pressure the same or higher than three hours ago -
1 Increasing, then steady; or increasing, then increasing more slowly Atmospheric pressure now higher than three hours ago
2 Increasing (steadily or unsteadily) (for reports from automatic stations, see Regulation 12.2.3.5.3) Atmospheric pressure now higher than three hours ago
3 Decreasing or steady, then increasing; or increasing, then increasing more rapidly Atmospheric pressure now higher than three hours ago
4 Steady; atmospheric pressure the same as three hours ago Atmospheric pressure now higher than three hours ago
5 Decreasing, then increasing; atmospheric pressure the same or lower than three hours ago -
6 Decreasing, then steady; or decreasing, then decreasing more slowly Atmospheric pressure now lower than three hours ago
7 Decreasing (steadily or unsteadily) (for reports from automatic stations, see Regulation 12.2.3.5.3) Atmospheric pressure now lower than three hours ago
8 Decreasing or steady, then decreasing; or decreasing, then decreasing more rapidly Atmospheric pressure now lower than three hours ago

Code Table 0370:

BtBt- Buoy type

Code Meaning
00 Unspecified drifting buoy
01 Standard Lagrangian drifter (Global Drifter Programme)
02 Standard FGGE type drifting buoy (non Lagrangian meteorological drifting buoy)
03 Wind measuring FGGE type drifting buoy (non Lagrangian meteorological drifting buoy)
04 Ice float
05-07 Reserved
08 Unspecified sub-surface float
09 SOFAR
10 ALACE
11 MARVOR
12 RAFOS
13-15 Reserved
16 Unspecified moored buoy
17 Nomad
18 3 metres discus
19 10-12 metres discus
20 ODAS 30 series
21 ATLAS (e.g. TAO area)
22 TRITON
23 Reserved
24 Omnidirectional wave-rider
25 Directional wave-rider
26-62 Reserved
// Missing value

Code Table 0877:

Direction (true)

Code Meaning
00 Calm (no waves)
01 5 - 14 degrees
02 15 - 24 degrees
03 25 - 34 degrees
04 35 - 44 degrees
05 45 - 54 degrees
06 55 - 64 degrees
07 65 - 74 degrees
08 75 - 84 degrees
09 85 - 94 degrees
10 95 - 104 degrees
11 105 - 114 degrees
12 115 - 124 degrees
13 125 - 134 degrees
14 135 - 144 degrees
15 145 - 154 degrees
16 155 - 164 degrees
17 165 - 174 degrees
18 175 - 184 degrees
19 185 - 194 degrees
20 195 - 204 degrees
21 205 - 214 degrees
22 215 - 224 degrees
23 225 - 234 degrees
24 235 - 244 degrees
25 245 - 254 degrees
26 255 - 264 degrees
27 265 - 274 degrees
28 275 - 284 degrees
29 285 - 294 degrees
30 295 - 304 degrees
31 305 - 314 degrees
32 315 - 324 degrees
33 325 - 334 degrees
34 335 - 344 degrees
35 345 - 354 degrees
36 355 - 4 degrees
99 Variable or all directions, or unknown or waves confused, direction indeterminate.

Code Table 0878:

True Direction, in tens of degrees, from which wind is blowing (or will blow) at stations within 1 degree of the North Pole.

Code Wind coming from a meridian between
00 Calm
01 5 - 15 degrees W
02 15 - 25 degrees W
03 25 - 35 degrees W
04 35 - 45 degrees W
05 45 - 55 degrees W
06 55 - 65 degrees W
07 65 - 75 degrees W
08 75 - 85 degrees W
09 85 - 95 degrees W
10 95 - 105 degrees W
11 105 - 115 degrees W
12 115 - 125 degrees W
13 125 - 135 degrees W
14 135 - 145 degrees W
15 145 - 155 degrees W
16 155 - 165 degrees W
17 165 - 175 degrees W
18 175 W - 175 degrees E
19 175 - 165 degrees E
20 165 - 155 degrees E
21 155 - 145 degrees E
22 145 - 135 degrees E
23 135 - 125 degrees E
24 125 - 115 degrees E
25 115 - 105 degrees E
26 105 - 95 degrees E
27 95 - 85 degrees E
28 85 - 75 degrees E
29 75 - 65 degrees E
30 65 - 55 degrees E
31 55 - 45 degrees E
32 45 - 35 degrees E
33 35 - 25 degrees E
34 25 - 15 degrees E
35 15 - 5 degrees E
36 5 E - 5 degrees W

Code Table 1770:

Ix Ix Ix - Instrument type for temperature, with fall rate equation coeficients for XBT

Code Figure Instrument Coefficient a Coefficient b
001 Sippican T-4 6.472 -2.16
002 Sippican T-4 6.691 -2.25
011 Sippican T-5 6.828 -1.82
021 Sippican Fast Deep 6.39* -1.82
031 Sippican T-6 6.472 -2.16
032 Sippican T-6 6.691 -2.25
041 Sippican T-7 6.472 -2.16
042 Sippican T-7 6.691 -2.25
051 Sippican Deep Blue 6.472 -2.16
052 Sippican Deep Blue 6.691 -2.25
061 Sippican T-10 6.301 -2.16
071 Sippican T-11 1.779 -0.255
081 Sippican AXBT (300m probes) 1.52 0.0
201 TSK T-4 6.472 -2.16
202 TSK T-4 6.691 -2.25
211 TSK T-6 6.472 -2.16
212 TSK T-6 6.691 -2.25
221 TSK T-7 6.472 -2.16
222 TSK T-7 6.691 -2.25
231 TSK T-5 6.828 -1.82
241 TSK T-10 6.301 -2.16
251 TSK Deep Blue 6.472 -2.16
252 TSK Deep Blue 6.691 -2.25
261 TSK AXBT - -
401 Sparton XBT-1 6.301 -2.16
411 Sparton XBT-3 5.861 -0.0904
421 Sparton XBT-4 6.472 -2.16
431 Sparton XBT-5 6.828 -1.82
441 Sparton XBT-5DB 6.828 -1.82
451 Sparton XBT-6 6.472 -2.16
461 Sparton XBT-7 6.472 -2.16
462 Sparton XBT-7 6.705 -2.28
471 Sparton XBT-7DB 6.472 -2.16
481 Sparton XBT-10 6.301 -2.16
491 Sparton XBT-20 6.472 -2.16
501 Sparton XBT-20DB 6.472 -2.16
510 Sparton 536 AXBT 1.524 0
700 Sippican XCTD standard - -
710 Sippican XCTD deep - -
720 Sippican AXCTD - -
730 Sippican SXCTD - -
741 TSK XCTD/XCTD-1 3.42543 -0.47
742 TSK XCTD-2 3.43898 –0.31
743 TSK XCTD-2F 3.43898 –0.31
744 TSK XCTD-3 5.07598 –0.72
745 TSK XCTD-4 3.68081 –0.47
751 TSK AXCTD - -
780 Sea-Bird SBE21 SEACAT Thermosalinograph - -
781 Sea-Bird SBE45 Micro TSG Thermosalinograph - -
800 Mechanical XBT - -
810 Hydrocast - -
820 Thermistor Chain - -
825 Temperature (sonic) and pressure probes - -
830 CTD - -
831 CTD - P-ALACE float - -
837 ARVOR_C, SBE conductivity sensor - -
838 ARVOR_D, SBE conductivity sensor - -
839 PROVOR–II, SBE conductivity sensor - -
840 PROVOR, No conductivity sensor - -
841 PROVOR, Seabird conductivity senson - -
842 PROVOR, FSI conductivity sensor - -
843 Polar Ocean Profiling System (POPS), PROVOR, SBE CTD - -
844 Profiling float, ARVOR, Sea-Bird conductivity sensor - -
845 Webb Research, no conductivity sensor - -
846 Webb Research, Sea-Bird conductivity sensor - -
847 Webb Research, FSI conductivity sensor - -
848 APEX–EM, SBE conductivity sensor - -
849 APEX_D, SBE conductivity sensor - -
850 SOLO, No conductivity sensor - -
851 SOLO, Seabird conductivity sensor - -
852 SOLO, FSI conductivity sensor - -
853 Profiling float, SOLO2 (SCRIPPS), Sea-Bird conductivity sensor - -
854 S2A, SBE conductivity sensor - -
855 Profiling Float, NINJA, no conductivity sensor - -
856 Profiling Float, NINJA, SBE conductivity sensor - -
857 Profiling Float, NINJA, FSI conductivity sensor - -
858 Profiling Float, NINJA, TSK conductivity sensor - -
859 Profiling float, NEMO, no conductivity sensor - -
860 Profiling Float, NEMO, SBE conductivity sensor - -
861 Profiling Float, NEMO, FSI conductivity sensor - -
862 SOLO_D, SBE conductivity sensor - -
863 NAVIS–A, SBE conductivity sensor - -
864 NINJA_D, SBE conductivity sensor - -
865 NOVA, SBE conductivity sensor - -
866 ALAMO, no conductivity sensor - -
867 ALAMO, RBR conductivity sensor - -
868 ALAMO, SBE conductivity sensor - -
869-899 Reserved Reserved - -
900 Sippican LMP-5 XBT 9.727 -0.0000473
901 Ice-tethered Profiler (ITP), SBE CTD - -
902 Brooke Ocean Moving Vessel Profiler (MVP) - -
903 Sea-Bird CTD - -
904 AML Oceanographic CTD - -
905 Falmouth Scientific CTD - -
906 Ocean Sensors CTD - -
907 Valeport CTD - -
908 Oceanscience MVP - -
909 IDRONAUT CTD - -
910 Sea-Bird SBE 38 - -
911-994 Reserved Reserved - -
995 Instrument attached to marine mammals - -
996 Instrument attached to animals other than marine mammals - -
997-999 Reserved Reserved - -

Notes:

  1. The depth is calculated from coefficients a and b and the time, t, as follows: z = at + 10-3bt2
  2. All unassigned numbers are reserved for future use.
  3. The values of a and b are supplied for information only.
  4. *The WMO code table quotes 6.346, but the Sippican software uses 6.39 (Reseghetti, 2017, oral communication)

Code table 1833:

ic - Indicator for units of sea surface current speed.

Code figure
0 Meters per second
1 Knots
9 No sea current data available

Code table 1853:

iu - Indicator for units of wind speed and type of instrumentation.

Code figure Units used Instruments certified or otherwise
0 Meters per second Land stations and ships with certified instruments
1 Knots Land stations and ships with certified instruments
2 Meters per second Ships with uncertified instruments
3 Knots Ships with uncertified instruments

Code table 1855:

iw - Indicator for source and units of wind speed.

Code figure Source Units
0 Wind speed estimated Wind speed in metres per second
1 Wind speed obtained from anemometer. Wind speed in metres per second
2 Wind speed estimated Wind speed in knots
3 Wind speed obtained from anemometer. Wind speed in knots

Code table 2262:

k1 - Indicator for digitization.

Code figure
7 Values at selected depths (data points fixed by the instrument or selected by any other method).
8 Values at significant depths (data points taken from traces at significant depths).

Code table 2263:

k2 - Method of salinity/depth measurement.

Code figure
0 No salinity measured
1 In situ sensor, accuracy better than 0.02 PSU.
2 In situ sensor, accuracy less than 0.02 PSU.
3 Sample analysis.

Code table 2264:

k3 - Duration and time of current measurement (vector or Doppler current profiling method).

Code figure
1 Instantaneous between H-1 and H
2 Averaged over 3 minutes or less.
3 Averaged over more than 3 minutes, but 6 at the most.
4 Averaged over more than 6 minutes, but 12 at the most.
5 Instantaneous between H-2 and H-1
6 Averaged over 3 minutes or less.
7 Averaged over more than 3 minutes, but 6 at the most.
8 Averaged over more than 6 minutes, but 12 at the most.
9 Vector or Doppler current profiling method not used.

Note: H = time of observation.

Code table 2265:

k4 - Period of current measurement (drift method).

Code figure
1 1 hour or less.
2 More than 1 hour but 2 at the most.
3 More than 2 hours but 4 at the most.
4 More than 4 hours but 8 at the most.
5 More than 8 hours but 12 at the most.
6 More than 12 hours but 18 at the most.
7 More than 18 hours but 24 at the most.
9 Drift method not used.

Code table 2266:

k5 - Indicator for the method of current measurement.

Code figure
0 Reserved
1 ADCP (Acoustic Doppler Current Profiler)
2 GEK (Geomagnetic ElectroKinetograph).
3 Ship's set and drift determined by fixes 3-6 hours apart.
4 Ship's set and drift determined by fixes more than 6 hours but less than 12 hours apart.
5 Drift of Buoy

Code table 2267:

k6 - Method of removing the velocity and motion of the ship or buoy from current measurement.

Code figure
0 Ship's motion removed by averaging. Ship's velocity removed by bottom tracking.
1 Ship's motion removed by motion compensation. -
2 Ship's motion not removed. -
3 Ship's motion removed by averaging. Ship's velocity removed by navigation.
4 Ship's motion removed by motion compensation. -
5 Ship's motion not removed. -
6 Doppler current profiling method not used. -
7-9 Reserved. -

Note: Code figures 0, 1, 2 and 6 are also used for drifting buoys.

Code table 2582:

MiMi
Identification letters of the report
MjMj
Identification letters of the part of the report or version of the code form
Code form - MiMi
Land station
MiMi
Sea station
MiMi
Aircraft
MiMi
Satellite
MjM
Part A
Part B Part C Part D No distinction
FM 12-XI Ext. SYNOP AA - - - - - - - XX
FM 13-XI Ext. SHIP - BB - - - - - - XX
FM 14-XI Ext. SYNOP MOBIL OO - - - - - - - XX
FM 18-XII BUOY - ZZ - - - - - - YY
FM 20-VIII RADOB FF GG - - AA BB - - -
FM 32-XI Ext. PILOT PP - - - AA BB CC DD -
FM 33-XI Ext. PILOT SHIP - QQ - - AA BB CC DD -
FM 34-XI Ext. PILOT MOBIL EE - - - AA BB CC DD -
FM 35-XI Ext. TEMP TT - - - AA BB CC DD -
FM 36-XI Ext. TEMP SHIP - UU - - AA BB CC DD -
FM 37-XI Ext. TEMP DROP - - XX - AA BB CC DD -
FM 38-XI Ext. TEMP MOBIL II - - - AA BB CC DD -
FM 39-VI ROCOB RR - - - - - - - XX
FM 40-VI ROCOB SHIP - SS - - - - - - XX
FM 41-IV CODAR - - LL - - - - - XX
FM 62-VIII Ext. TRACKOB - NN - - - - - - YY
FM 63-IX BATHY - JJ - - - - - - VV
FM 63-X Ext. BATHY - JJ - - - - - - YY
FM 63-XI Ext. BATHY - JJ - - - - - - VV
FM 64-IX TESAC - KK - - - - - - XX
FM 64-XI Ext. TESAC - KK - - - - - YY
FM 65-XI Ext. WAVEOB - MM - - - - - - XX
FM 67-VI HYDRA HH - - - - - - - XX
FM 85-IX SAREP CC DD - - AA BB - - -
FM 86-XI SATEM - - - VV AA BB CC DD -
FM 87-XI. SARAD - - - WW - - - - XX
FM 88-XI SATOB - - - YY - - - - XX

Code table 2604

mS Averaging period for salinity
mT Averaging period for sea temperature
mc Averaging period for surface current direction and speed

Code Figure
0 Spot values
1 Less than 15 minutes
2 From 15 to 45 minutes
3 More than 45 minutes
9 Data not available

Code table 3302

Qa - Location quality class (range of radius of 66% confidence)

Code Figure
0 Radius greater than or equal to 1500 m
1 Radius greater than or equal to 500 m but less than 1500 m
2 Radius greater than or equal to 250 m but less than 500 m
3 Radius less than 250 m
/ Location quality class information not available

Code table 3311

QL - Quality of location

Code Figure
0 The value transmitted at the beginning of the report is a reliable value (location made over two satellite passes)
1 The values at the beginning of the report are the latest known values (no location over the corresponding pass)
2 Dubious quality. The location was made over one pass only; a second solution is possible in 5% of the cases.

Code table 3313

QN - Quality of the buoy satellite transmission

Code Figure
0 Good quality (several identical reports have been received)
1 Dubious quality (no identical reports)

Code table 3315

QP - Quality of the pressure measurement

Code Figure
0 Value within specified limits
1 Value outside specified limits

Code table 3318

Qz - Depth correction indicator

Code Figure
0 Depths are not corrected
1 Depths are corrected
/ Missing value

Code table 3319

QTW - Quality of the measurement of the water-surface temperature

Code Figure
0 Value within limits
1 Value outside limits)

Code table 3333:

Qc - Quadrant of the globe.

Code Figure Latitude Longitude
1 North East
3 South East
5 South West
7 North West
Image showing Quadrant of the globe. Details below

Note: The choice is left to the observer in the following cases:

  • When the ship is on the Greenwich meridian or the 180th meridian (LoLoLoLo = 0000 or 1800 respectively).
    • Qc = 1 or 7 (northern hemisphere) or
    • Qc = 3 or 5 (southern hemisphere);
  • When the ship is on the equator (LaLaLa = 000):
    • Qc = 1 or 3 (eastern longitude) or
    • Qc = 5 or 7 (western longitude).

Code table 3334

  • Qd - Quality control indicator
  • Qd1 - Quality control indicator for temperature/salinity profile
  • Qd2 - Quality control indicator for current profile
  • Ql - Quality control indicator for position
  • Qt - Quality control indicator for time
Code Figure
0 Data not checked
1 Data good
2 Data inconsistent
3 Data doubtful
4 Data wrong
5 Data value has been changed

NOTE: These flags are the same as the IGOSS quality control flags.

Code table 3363

Q2 - Quality of the housekeeping parameter (second word in first block of ARGOS okatform transmitters sensor data)
Q4 - Quality of the measurement of air temperature

Code Figure
0 Value within limits
1 Value outside limits

Code table 3845:

sn - Sign of the data, and relative humidity indicator.

Code Figure
0 Positive or zero
1 Negative
9 Realtive humidity follows

Notes:

  1. Code figures 2 to 8 are not used.
  2. See Regulation 12.2.3.3.1 for the use of code figure 9.

Code Table 4770:

XrXr -Recorder Type This table encodes the various recorders used to log temperatures from the instruments listed.

Code Recorder
01 Sippican strip chart recorder
02 Sippican MK2A/SSQ-61
03 Sippican MK-9
04 Sippican AN/BHQ-7/MK8
05 Sippican MK-12
06 Sippican MK-21
07 Sippican MK-8 Linear Recorder
08 Sippican MK-10
10 Sparton SOC BT/SV Processor Model 100
11 Lockheed-Sanders Model OL5005
20 Argos XBT-ST
21 CLS-ARGOS / Protecno XBT-ST Model-1
22 CLS-ARGOS / Protecno XBT-ST Model-2
30 BATHY Systems SA-810
31 Scripps Metrobyte controller
32 Murayama Denki Z-60-16 III
33 Murayama Denki Z-60-16 II
34 Protecno ETSM2
35 Nautilus Marine Service NMS-XBT
40 TSK MK-2A
41 TSK MK-2S
42 TSK MK-30
43 TSK MK-30N
45 TSK MK-100
46 TSK MK-130 Compatible recorder for both XBT and XCTD
47 TSK MK-130A XCTD recorder
48 TSK AXBT Receiver MK-300
49 TSK MK-150/MK-150N Compatible recorder for both XBT and XCTD
50 JMA ASTOS
60 ARGOS communications, sampling on up transit
61 ARGOS communications, sampling on down transit
62 Orbcomm communications, sampling on up transit
63 Orbcomm communications, sampling on down transit
64 Iridium communications, sampling on up transit
65 Iridium communications, sampling on down transit
70 CSIRO Devil-1 XBT acquisition system
71 CSIRO Devil-2 XBT acquisition system
72 TURO/CSIRO Quoll XBT acquisition system
80 Applied Microsystems Ltd., MICRO-SVT&P
81 Sea Mammal Research Unit, Univ. St. Andrews, UK, uncorrected salinity from a sea mammal mounted instrument
82 Sea Mammal Research Unit, Univ. St. Andrews, UK, corrected salinity from a sea mammal mounted instrument
99 Unknown

Code table 4780:

XtXt - Drogue type

Code Meaning
0 Unspecified drogue
1 Holey sock
2 TRISTAR
3 Window shade
4 Parachute
5 Non Langrangian sea anchor
6-30 Reserved
// Missing value
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