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• IR 2020 - Radar 9 GHz (non-SOLAS) in the maritime radionavigation service [pdf]
  Updated on 12 December 2005
• IR 2021- VHF transmitters and receivers for use at coast stations in the maritime mobile service [pdf]
• IR 2023 - Transmitters and receivers in the MF/HF bands for use at coast stations in the maritime mobile service [pdf]
• IR 2024 - Portable radiotelephone equipment in the maritime mobile service operating in the VHF bands (for non-GMDSS applications only) [pdf]
• IR 2025 - Shipborne automatic identification system in the VHF band of the maritime mobile service [pdf]
• IR 2026 - UK Radio Licence Interface Requirement 2026 for VHF radiotelephone equipment for general communications and associated equipment for Class "D" Digital Selective Calling (DSC) [pdf]
• IR 2029 - UK Radio Interface Requirement 2029 for Maritime Emergency Position indicating Radio Beacons (EPIRBs) intended for use on the frequency 121,5MHz or the frequencies 121,5 MHz and 243 MHz for homing purposes only [pdf]
• IR 2031 - For Racons (3GHz and 9GHz) in the maritime radionavigation service. [pdf]
• IR 2032 - For transmission of differential correction signals of Global Navigation Satellite Systems (DGNSS) from Maritime Radio stations in the Frequency Bands 162.4375-162.4625 and 163.0125-163.03125 MHz. [pdf]
• IR 2033 - For a universal shipborne automatic identification system using time division multiple access in the VHF band of the maritime mobile service for use at coast station and unmanned maritime buoys [pdf]
• IR 2034 - For Radio Beacons of the Maritime Radiodetermination Service in the Frequency Band 283.5-315 kHz [pdf]
• IR 2035 Maritime UHF on-board communications systems and equipment [pdf]
• IR 2039 - For hand-held / Transportable radiotelephone equipment with DSC Distress Alerting Capability in the maritime mobile service operating in the VHF bands (for non-SOLAS applications only) [pdf]
• IR 2042 - Maritime Personal Locator Beacons (PLBs) intended for use with the COSPAS-SARSAT [pdf]

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