GB/T 39620-2020 in English
SUPERSEDEDTechnical requirements for coastal automatic identification system(AIS)base station
- Issued on:2020-12-14
- Implemented on:2021-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$214.00
| Standard No: | GB/T 39620-2020 |
| Document status: | SUPERSEDED |
| Superseded by: |
GB/T 39620-2025 Technical requirements and test methods for automatic identification system （AIS）base stations
|
| Superseded on: | 2026-05-01 |
| Title in English: | Technical requirements for coastal automatic identification system(AIS)base station |
| Title in Chinese: | 沿海船舶自动识别系统（AIS）基站技术要求 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-12-14 |
| Implemented on: | 2021-07-01 |
| ICS Classification: | 03.220.40-Transport by water |
| Chinese Classification: | R63-Navigation mark setting and operating |
| Professional Classification: | GB-National Standard |
| Related Keywords: | coastal ais base stations
base station base station introduction standard background donghai base station coastal automatic identification system |
| Related Topics: | AIS
sea ship Automated peak identification ais system system ais ais system Research Front Identification coastal china coastal nuclear power plant GBT39620 GB/T 39620-2020 shipais |
《GB/T 39620-2020沿海船舶自动识别系统（AIS）基站技术要求》由348（交通运输部）归口，主管部门为交通运输部。
Introduction
Standard Background and Evolution
As the first technical specification for coastal AIS base stations in my country, this standard fills the gap in the standardization of maritime communication infrastructure. Compared with international standards such as IMO MSC.74(69), it adds site selection requirements and dual-machine hot standby configuration solutions that adapt to the characteristics of my country's coastline.
Analysis of Core Technical Requirements
1. Scientific Model for Base Station Site Selection
Coverage range calculation formula: d=2.4(√h1+√h2), where h1 is the base station antenna altitude, and h2 is 0 to calculate the theoretical maximum value. The actual site selection should be combined with:
| Consideration dimensions | Technical parameters | Test methods |
|---|---|---|
| Electromagnetic environment | Noise at working frequency ≤-117dBm | GB 8702-2014 |
| Geographic conditions | Unobstructed line of sight, priority should be given to the use of existing facilities | Field survey |
| Safety distance | ≥6m in public areas | Laser rangefinder |
2. Key indicators of transceiver equipment
The following should be met in hot standby mode:
- Transmitter: carrier power 12.5W (±1.5dB), channel switching ≤25ms
- Receiver: sensitivity ≤-107dBm, PER tolerance 20%
- GNSS module: positioning error ≤10m, timing error ≤20ns
3. Antenna System Configuration
Typical Configuration Comparison:
| Type | Gain requirement | Installation spacing | Applicable scenarios |
|---|---|---|---|
| Omnidirectional antenna | ≥6dBi | Vertical 1.7m | Uniform coverage near the shore |
| Directional antenna | ≥9dBi | Horizontal 8m | Key monitoring of waterways |
Implementation suggestions
1. Construction phase
It is recommended to adopt a three-stage verification method: electromagnetic environment pre-detection → simulation signal coverage test → full function joint debugging
2. Operation and maintenance management
Establish MMSI coding files (MID 412-414), and the time slot utilization monitoring threshold is recommended to be set to 45% to reserve a safety margin
3. Special areas
For typhoon-prone areas, the antenna wind resistance level should be increased to 70m/s, and the feeder needs to be equipped with an anti-vibration bracket
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