Bathythermograph Data File Format

Master Record

Field	Name	Descriptions
01-02	Country Code	Originator's nationality code
03-04	Ship Code	JODC ship code
05-08	Call Sign	Ship's call sign
09-13	Latitude	Degrees, minutes and 1/10 minutes
14	Lat. Hem.	Hemisphere of latitude (N or S)
15-20	Longitude	Degrees, minutes and 1/10 minutes
21	Long. Hem.	Hemisphere of longitude (E or W)
22-30	Observation Date (GMT)
22-23	Year	Last 2 digits of year
24-25	Month	Month
26-27	Day	Day
28-30	Time	Hours to tenths
31-37	Station No.	Originator's station number
38-40	Instrument	Instrument code
41-42	Recorder	Recorder code
43	Continuous	Continuous data (Y/N)
44-47	Depth	Depth to bottom in meters
48-51	Wind
48-49	Direction	Value in 36 points, 00 : Calm
50-51	Speed(S/F)	Wind speed(S) in knots Wind force(F) in Beaufort scale indicated by "-" in column 50
52-54	Air Pressure	Air pressure in hPa to tenths
55-57	Air Temp. Dry	Dry-bulb temperature, sign indicator and value(deg-C) to tenths
58-60	Air Temp. Wet	Wet-bulb temperature, sign indicator and value(deg-C) to tenths
61-65	Wave
61-62	Direction	Value in 36 points, 00 : Calm
63-64	H/A	Wave height(H) in WMO code 1555, Sea state(A) in WMO code 3700 indicated by "-" in column 63
65	Period	Wave period in WMO code 3155
66	Project	Project name code
67	Inst. Type	Instrument type ; 1 : MBT , 2 : XBT , 3 : DBT , 4 : AXBT
68-73	JODC Ref. No.	JODC processing number
74-77	Consec. No.	JODC consecutive station number
78-79	Card No.	Record sequence Number (Always "01")
80	Record type	Always "1"

Data Record-Standard Levels

Field	Name	Descriptions
01-02	Country code	Same as Master Record
03-06	Temperature
03	Sign	"-" indicates negative temperature
04-06	Value	Value at 0, 500 or 1500m in deg-C to tenths
07-10	Temperature
07	Sign	Same as above item
08-10	Value	Value at 10, 550 or 2000m in deg-C to tenths
11-14	Temperature
11	Sign	Same as above item
12-14	Value	Value at 20, 600 or 2500m in deg-C to tenths
15-18	Temperature
15	Sign	Same as above item
16-18	Value	Value at 30, 650 or 3000m in deg-C to tenths
19-22	Temperature
19	Sign	Same as above item
20-22	Value	Value at 50, 700 or 3500m in deg-C to tenths
23-26	Temperature
23	Sign	Same as above item
24-26	Value	Value at 75, 750 or 4000m in deg-C to tenths
27-30	Temperature
27	Sign	Same as above item
28-30	Value	Value at 100, 800 or 4500m in deg-C to tenths
31-34	Temperature
31	Sign	Same as above item
32-34	Value	Value at 125, 850 or 5000m in deg-C to tenths
35-38	Temperature
35	Sign	Same as above item
36-38	Value	Value at 150, 900 or 5500m in deg-C to tenths
39-42	Temperature
39	Sign	Same as above item
40-42	Value	Value at 200, 950 or 6000m in deg-C to tenths
43-46	Temperature
43	Sign	Same as above item
44-46	Value	Value at 250, 1000 or 6500m in deg-C to tenths
47-50	Temperature
47	Sign	Same as above item
48-50	Value	Value at 300, 1100 or 7000m in deg-C to tenths
51-54	Temperature
51	Sign	Same as above item
52-54	Value	Value at 350, 1200 or 7500m in deg-C to tenths
55-58	Temperature
55	Sign	Same as above item
56-58	Value	Value at 400, 1300 or 8000m in deg-C to tenths
59-62	Temperature
59	Sign	Same as above item
60-62	Value	Value at 450, 1400 or 8500m in deg-C to tenths
63-65	SL	Surface layer depth in meters
66	Filler	Blank
67	Inst. Type	Instrument type, same as Master
68-73	JODC Ref. No.	Same as Master
74-77	Consec. No.	Same as Master
78-79	Card No.	Record sequence Number
80	Record type	Always "2"

Data Record-Significant Depths (Optional)

Temperature at Significant Depth

The selected significant depth and its temperature are recorded in order of descending depth when necessary.
A data is composed following items.

Field	Length	Description
Depth	4	Significant depth in meters
Sign	1	"-" indicates negative temperature
Temp.	3	Temperature at above depth in deg-C to tenths