This standard specifies the performance requirements for search and rescue radar transponders (SARTs) operating in the 9 GHz frequency band for maritime search and rescue operations. This standard applies to SARTs required by the Global Maritime Distress Safety System (GMDSS). This standard is the basis for the formulation of various SART product standards. GB 15216-1994 Performance requirements for search and rescue radar transponders (SARTs) for the Global Maritime Distress Safety System (GMDSS) GB15216-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Global marltime distress and safety systemPerformance requirements for marine searchand rescue redar transponder (SART)GB 15216—94
This standard is equivalent to the IEC1097-1 international standard Global Maritime Distress and Safety System (GMDSS) Part 1 Search and rescue radar transponder (SART) - Operation and performance requirements, test methods and required test results. 1 Subject content and scope of application
This standard specifies the performance requirements of search and rescue radar transponders (SARTs) operating in the 9 GHz frequency band for maritime search and rescue operations. This standard applies to SARTs required to be equipped by the Global Maritime Disaster Safety System (GMDSS). This standard is the basis for the formulation of various SART product standards.
2 Reference standards
GB9391 Technical requirements and use requirements for marine equipment Test methods and required test results GB12267 General requirements and test methods for marine navigation equipment 3 Performance requirements
3.1 General requirements
SART should be able to display a series of equally spaced points on the radar of the receiver to indicate the position of the receiver who falls into the water from a height of 20 m without being damaged,
It should be able to stay in the water at a depth of 10 m for at least 5 min It should remain watertight when subjected to a 45'C thermal shock under specified condensation conditions. It should be able to float positively when dropped into the water alone. It should be equipped with a short buoyant case (not less than 10 m) for use as a mooring rope. It should be able to resist the corrosion of swimming and oil. It should be able to withstand long-term sunlight without performance degradation. The external structure should be smooth and the surface color should be yellow or orange. The weight should be suitable for manual carrying. 3.2 Operation requirements It should be easy for unskilled personnel to start it. There should be a device to prevent accidental start-up. There should be an audible or visual indicator, or both, to indicate whether it is working normally and to remind the person in distress that the SART has been searched. The radar should be triggered. It should be able to be started and closed manually, and it may also have an automatic start function. d. Approved by the State Administration of Technical Supervision on August 8, 1994 and implemented on May 1, 1995. GB 15216—94
Should have the function of indicating the standby state (started but not triggered). e.
3.3 Power supply requirements
After the SART works in the standby state for 96 hours, it can provide 8 hours of reply transmission under continuous interrogation with a pulse repetition frequency of 1kHz.
3.4 ​​Environmental (temperature) requirements
SART should be able to work in an environment of -20~~+55℃, and can be stored at a temperature of -30~+65℃ without damage. 3.5 Antenna height
The antenna height of the SART installed on the digital lifeboat should be at least 1m above the sea level. 3.6 Antenna characteristics
The vertical directivity diagram of the SART antenna and its hydrodynamic characteristics should enable it to respond to the search radar under extreme conditions. The horizontal directivity diagram of the antenna is basically omnidirectional, and both transmission and reception should use horizontal polarized waves. 3.7 Distance performance
When a marine radar that meets the requirements of GB9391 uses a 15m high antenna to interrogate a SART at least 5nmile away, the SART should be able to work normally. When an airborne radar with a peak output power of not less than 10kW interrogates a SART at least 30nmile away at 900m, the SART should also be able to work normally. 4 Marking
In addition to meeting the requirements of Article 10.2 of GB12267, the product marking should also clearly indicate simple operating instructions (in Chinese and English) and the expiration date of the original battery used (in Chinese and English) on the outside of the equipment. 5 Technical characteristics
5.1 Frequency range: 9200~9500MHz. 5.2 Polarization mode: horizontal polarization. www.bzxz.net
5.3 Sweep rate: 200MH2/5μS, nominal value. 5.4 Response signal format: 12 scans
5.5 Sweep form: sawtooth wave, forward sweep time 7.5±1s, reverse sweep time 0.4±0.1μ5, response starts from reverse sweep. 5.6 Pulse duration: 100μs, nominal value. 5.7 Equivalent isotropic radiated power, not less than 400mW (equivalent to +26dBm). 5.B Receiver effective sensitivity: better than -50dBm (equivalent to 0.1mW/m2) when the interrogation radar pulse width is greater than 400ns (medium or long pulse); better than -37dBm when the interrogation radar pulse width is less than or equal to 100ns (short pulse), 5.9 Working time: after working for 96h in standby mode, it can also provide 8h of response transmission under continuous interrogation with a pulse repetition frequency of 1kHz.
5.10 Recovery time after excitation: less than or equal to 10, 5.11 Delay time from receiving the search radar signal to starting to transmit the reply signal = less than or equal to 0.5μ. 5.12 Antenna vertical beam width, relative to the horizontal plane of the SART, minimum ±12.5° 5.13 Antenna horizontal beam width: 360°, circularity within ±2dB. Additional Notes
15216--94
This standard is proposed by the Ministry of Transport of the People's Republic of China. This standard is under the jurisdiction of the Ministry of Transport's Communication and Navigation Standardization Technical Committee. This standard was drafted by Dalian Maritime University. The main drafter of this standard is Yuan Ancun.
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