Purpose
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1575 - Guidelines for Shipborne Position, Navigation And Timing (PNT) Data Processing – (16 June 2017) - Annex - Guidelines for Shipborne Position, Navigation and Timing (PNT) Data Processing - Purpose

Purpose

 1 The purpose of these Guidelines is to enhance the safety and efficiency of navigation by improved provision of position, navigation and timing (PNT) data to bridge teams (including pilots) and shipboard applications (e.g. AIS, ECDIS, etc.).

2 The shipborne provision of resilient PNT data and associated integrity (I) and status data (S) is realized through the combined use of onboard hardware (HW) and software (SW) components. The shipborne PNT Data Processing (PNT-DP) is the core repository for principles and functions used for the provision of reliable and resilient PNT data.

3 The PNT-DP specified within these Guidelines is defined as a set of functions facilitating:

  • .1 multiple sources of data provided by PNT-relevant sensors and services (e.g. GNSS receiver, DGNSS corrections) and further onboard sensors and systems (e.g. radar, gyro, speed and distance measuring equipment (SDME), echo-sounder providing real-time data) to exploit existing redundancy in the PNT-relevant input data; and

  • .2 multi-system and multi-sensor-based techniques for enhanced provision of PNT data.

4 These Guidelines aim to establish a modular framework for further enhancement of shipborne PNT data provision by supporting:

  • .1 consolidation and standardization of requirements on shipborne PNT data provision considering the diversity of ship types, nautical tasks, nautical applications, and the changing complexity of situations up to customized levels of support;

  • .2 the identification of dependencies between PNT-relevant data sources (sensors and services), applicable PNT data processing techniques (methods and thresholds) and achievable performance levels of provided PNT data (accuracy, integrity, continuity and availability);

  • .3 harmonization and improvement of onboard PNT data processing based on a modular approach to facilitate changing performance requirements in relation to nautical tasks, variety of ship types, nautical applications, and under consideration of user needs (SN.1/Circ.274);

  • .4 the consequent and coordinated introduction of data and system integrity as a smart means to protect PNT data generation against disturbances, errors, and malfunctions (safety) as well as intrusions by malicious actors; and

  • .5 standardization of PNT output data including integrity and status data.

Parent topic: Annex - Guidelines for Shipborne Position, Navigation and Timing (PNT) Data Processing
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