The standard Hydrology file has a maximum of 80 columns per line.
Here is an example record:
FR8505 000002P8510-16146 1-OCT-85 7: 8: 0-16 37.40 146 16. 0 92 82 9
7:22: 0-16 37.40 146 16.00
8: 8: 0-16 36.83 146 14.86
59 2.10P 024.97335.184216.40 0.190 0.00 0.0 0.020 0.250
58 13.30P 11 35.182225.44 0.210 0.00 0.0 0.030 0.290
57 23.00P 1024.96435.173216.10 0.190 0.00 0.0 0.030 0.280 20.29
56 32.20P 9 35.183216.40 0.190 0.00 0.0 0.030 0.290
55 42.20P 024.96735.185215.81 0.190 0.00 0.0 0.030 0.290 44.08
54 51.10P 7 35.183216.69 0.190 0.00 0.0 0.030 0.270
53 61.80P 6 35.183217.86 0.190 0.00 0.2 0.030 0.270
23 71.20P 5 35.183216.69 0.190 0.00 0.0 0.030 0.270
15 82.40P 1 35.208216.69 0.210 0.00 0.0 0.030 0.280
The first three lines represent the header section, as follows:
Column Number (position) 00000000011111111112222222223333333333344444444445555555555666666666677777777778 12345678901234567890123456789012345678901234567890123456789012345678901234567890
FR8505 000002P8510-16146 1-OCT-85 7: 8: 0-16 37.40 146 16. 0 92 82 9
7:22: 0-16 37.40 146 16.00
8: 8: 0-16 36.83 146 14.86
| Record Position |
Explanation |
| First Row | |
| 1 | Blank |
| 2-3 | Vessel Code |
| 4-5 | Year - last 2 digits of year |
| 6-9 | Cruise Code |
| 10-15 | Station number |
| 16 | P=Primary, S=Secondary |
| 17-18 | Year - last 2 digits of year |
| 19-20 | Month |
| 21-23 | Latitude - south is negative (degrees only) |
| 24-26 | Longitude (degrees only) |
| 27-35 | Date format xx-mon-xx (mon=first three letters of month) |
| 36-43 | Start time hh:mm:ss |
| 44-62 | Start position xxx xx.xx xxx xx.xx (-ve for south; west longitude is 360-longitude) |
| 63 | Blank |
| 64-67 | Sonic depth at bottom in metres |
| 68-71 | Maximum sample pressure (dbars) |
| 72-74 | Number of detail records |
| 75-80 | Blank |
| Second Row | |
| 1-35 | Blank |
| 36-43 | Bottom time |
| 44-62 | Bottom position |
| 63-80 | Blank |
| Third Row | |
| 1-35 | Blank |
| 36-43 | End time |
| 44-62 | End position |
| 63-80 | Blank |
The remaining lines represent the detailed section record, as follows:
Column Number (position) 00000000011111111112222222223333333333344444444445555555555666666666677777777778 12345678901234567890123456789012345678901234567890123456789012345678901234567890
59 2.10P 024.97335.184216.40 0.190 0.00 0.0 0.020 0.250 58 13.30P 11 35.182225.44 0.210 0.00 0.0 0.030 0.290 57 23.00P 1024.96435.173216.10 0.190 0.00 0.0 0.030 0.280 20.29 56 32.20P 9 35.183216.40 0.190 0.00 0.0 0.030 0.290 55 42.20P 024.96735.185215.81 0.190 0.00 0.0 0.030 0.290 44.08 54 51.10P 7 35.183216.69 0.190 0.00 0.0 0.030 0.270 53 61.80P 6 35.183217.86 0.190 0.00 0.2 0.030 0.270 23 71.20P 5 35.183216.69 0.190 0.00 0.0 0.030 0.270 15 82.40P 1 35.208216.69 0.210 0.00 0.0 0.030 0.280
| Record Position |
Explanation |
| 1-3 | Niskin Bottle Number |
| 4-10 | Pressure, 2 decimal places in dbars - (Note: for coastal stations, this may be replaced by sampling depth in metres, which is effectively exactly equivalent) |
| 11 | P/S (primary, secondary) |
| 12-19 | Blank |
| 20-21 | Rosette position |
| 22-27 | Temperature (degrees C) from reversing thermometres - blank where no thermos |
| 28-33 | Salinity (psu) |
| 34-39 | Oxygen (micromole/litre) |
| 40-45 | Phosphate (micromole/litre) |
| 46-51 | Nitrate (micromole/litre) See Warning below |
| 52-57 | Silicate (micromole/litre) |
| 58-65 | Nitrite (micromole/litre) |
| 66-73 | Ammonia (micromole/litre) |
| 74-80 | Thermometric depth (metres) |
For methods used to determine the varous chemical
parameters refer to the following: