QX/T 333-2016 in English
VALIDShip pilotage meteorological conditions level
- Issued on:2016-09-29
- Implemented on:2017-03-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$184.00
| Standard No: | QX/T 333-2016 |
| Document status: | VALID |
| Title in English: | Ship pilotage meteorological conditions level |
| Title in Chinese: | 船舶引航气象条件等级 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2016-09-29 |
| Implemented on: | 2017-03-01 |
| ICS Classification: | 07.060-Geology. Meteorology. Hydrology |
| Chinese Classification: | A47-Meteorology |
| Professional Classification: | QX-Meteorology |
Introduction
Interpretation of the core content of the standard
Grading mechanism
| Impact dimensions | Grade I (smaller) | Grade II (general) | Grade III (larger) | Grade IV (significant) | Grade V (extremely large) |
|---|---|---|---|---|---|
| Wind force (m/s) | ≤10.8 | 10.9-13.8 | 13.9-17.1 | 17.2-20.7 | ≥20.8 |
| Visibility (km) | ≥4.0 | 2.0-4.0 | 1.0-2.0 | 0.5-1.0 | <0.5 |
Key Technical Points
1. Principle of taking the higher of two indicators
The final level is determined by the formula G=max(Gw,Gv), where:
- Gw: Wind impact level (based on the higher of the average wind speed or the gust speed)
- Gv: Visibility impact level
2. Wind speed observation specification
Use 2-minute average wind speed and 3-second gust wind speed as dual indicators. When the judgment levels of the two are inconsistent:
- Take the higher level as the final wind impact level
- For example: if the average wind speed is level 6 (10.8m/s) but the gust reaches level 8 (17.5m/s), it will be judged as level 8
Implementation Recommendations
Port Operation Decision Guide
| Meteorological Level | Operation Recommendations | Emergency Plan |
|---|---|---|
| Grade I-II | Normal pilotage | Strengthen lookout |
| Grade III | Restricted operating vessel types | Initiate escort plan |
| Grade IV-V | Suspend pilotage | Anchorage shelter |
Standard Evolution Analysis
This standard innovatively combines GB/T 28591-2012 wind force levels with maritime operation scenarios. The main technical breakthroughs include:
- The first definition of GB/T 28591-2012 wind force levels class=instrument>Quantitative standard for effective navigation visibility (dual-track system of manual observation and instrument observation)
- Establish a level correction mechanism for gust wind speed
- Clearly define visibility of 1km as the key threshold (corresponding to level III)
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
QX/T 705-2023 in English
Technical Specifications for Division of Lightning-prone Areas
2023-12-30 -
QX/T 301-2015 in English
Forestry Meteorological Observation Specifications Part 4: Observation of Moisture Content of Combustible Materials on Forest Ground Cover
2015-12-11 -
QX/T 740-2024 in English
Generating specifications for urban forecasts based on grid forecasts Weather phenomena
2024-11-26 -
QX/T 41-2022 in English
air quality forecast
2022-01-07 -
QX/T 257-2015 in English
Calibration method of hair hygrometer(hygrograph)
2015-01-26 -
QX/T 712-2024 in English
Climate Change Impact Assessment Food Crop Yield Vulnerability
2024-06-20
