WMO Code Tables

Code Table 0114: A_N - 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 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)
3	Decreasing or steady, then increasing; or increasing, then increasing more rapidly
4	Steady; atmospheric pressure the same as 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)
8	Decreasing or steady, then decreasing; or decreasing, then decreasing more rapidly

Code Table 0370:

B_tB_t- 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:

I_x I_x I_x - 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	6.346	-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
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	3.42543	-0.47
742	TSK XCTD-2
743	TSK XCTD-2F
751	TSK AXCTD
800	Mechanical XBT	not applicable
810	Hydrocast	not applicable
820	Thermistor Chain	not applicable
830	CTD	not applicable
831	CTD - P-ALACE float	not applicable
840	PROVOR	No conductivity sensor
841	PROVOR	Seabird conductivity senson
842	PROVOR	FSI conductivity sensor
845	Web Research	No conductivity sensor
846	Web Research	Seabird conductivity sensor
847	Web Research	FSI conductivity sensor
850	SOLO	No conductivity sensor
851	SOLO	Seabird conductivity senson
852	SOLO	FSI conductivity sensor
853-854	Reserved
855	Profiling Float, NINJA, no conductivity sensor	Not applicable
856	Profiling Float, NINJA, SBE conductivity sensor	Not applicable
857	Profiling Float, NINJA, FSI conductivity sensor		Not applicable
858	Profiling Float, NINJA, TSK conductivity sensor		Not applicable
859	Profiling Float, NEMO, no conductivity
860	Profiling Float, NEMO, SBE conductivity sensor
861	Profiling Float, NEMO, FSI conductivity sensor
862-999 Reserved	Reserved
900	Sippican T-12 XBT	9.727	-0.0000473
901-999 Reserved	Reserved
832-999 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.

Code table 1833:

i_c - 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:

i_u - 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
2	Meters per second	Ships with uncertified instruments
3	Knots

Code table 1855:

i_w - 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.
2	Wind speed estimated	Wind speed in knots
3	Wind speed obtained from anemometer.

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				MjM
		Land station	Sea station	Aircraft	Satellite	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

m_S Averaging period for salinity
m_T Averaging period for sea temperature
m_c 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

Q_a - 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

Q_L - 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

Q_N - 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

Q_P - Quality of the pressure measurement

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

Code table 3318

Q_z - Depth correction indicator

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

Code table 3319

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

Code Figure
0	Value within limits
1	Value outside limits)

Code table 3333:

Q_c - Quadrant of the globe.

Code Figure	Latitude	Longitude
1	North	East
3	South	East
5	South	West
7	North	West

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

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

Code table 3334

• Q_d - Quality control indicator
• Q_d1 - Quality control indicator for temperature/salinity profile
• Q_d2 - Quality control indicator for current profile
• Q_l - Quality control indicator for position
• Q_t - 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:

s_n - 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
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-100 Compatible recorder for both XBT and XCTD
47	TSK MK-1130A XCTD
48	TSK AXBT Receiver MK-300
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
99	Unknown

Code table 4780:

X_tX_t - 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