| 1. | 4 - indicates that precipitation group is omitted
4 -不包括降水量组指示码 |
| 2. | 9 9 - indicator for sea station position groups
9 9 -船舶位置组指示码 |
| 3. | 0 - group indicator for sea surface temperature
0 -海面水温组指示码 |
| 4. | 4 - group indicator for period and height of the predominant swell
4 -主涌浪周期及高度组指示码 |
| 5. | 8 - group indicator for wet bulb temperature
8 -湿球温度组指示码 |
| 6. | 2 - group indicator for dew - point temperature
2 -露点组指示码 |
| 7. | 3 - group indicator for swell directions
3 -涌浪方向组指示码 |
| 8. | 5 - group indicator for pressure change
5 -气压变化组指示码 |
| 9. | Ice : indicator , ice group follows
Ice :指示码，随后为海冰组 |
| 10. | 1 - group indicator for air temperature
1 -气温组指示码 |
