| Flags | Description of Flags |
|---|---|
| 0 | |
| 1 | original data |
| 2 | corrected value by JODC |
| 3 | interpolated value by JODC |
| 4 | caiculated value by JODC |
| 5 | corrected value by MIRC(Marine Information Research Center) |
| 6 | interpolative value by MIRC(Marine Information Research Center) |
| 7 | |
| 8 | |
| 9 | error flag by offerer |