Implementation Challenges and Solutions for Real-Time Navigational Warning Service with S-124

This document outlines the introduction, process overview, data export requirements, current state of text-based warnings, and challenges in information extraction related to the implementation of a real-time navigational warning service for Australia using the S-124 standard. Key challenges include integrating with old systems, inadequate source data, and the need to extract S-124 attributes from text-based warnings. The vision is to enhance navigational safety alongside SafetyNet.

• Navigational Warning Service
• S-124 Standard
• Implementation Challenges
• Data Export
• Information Extraction

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1. S-124 Production and Provision (Trials) Australian Maritime Safety Authority Julius Moeller IHO, Monaco 4 8 September 2023

2. INTRODUCTION Vision: Real-time navigational warning service for Australia, to complement SafetyNet using S-124 Challenges: Integration with old system Source data in old systems not sufficient Cyber Security IHO, Monaco 4 8 September 2023

3. PROCESS OVERVIEW VDES Data Export from AMSA s Nexus System Extract Required Information Generate S-124 Data Set Service for Transmission IHO, Monaco 4 8 September 2023

4. DATA EXPORT Data export is required to get the source data for S-124 generation Nexus system uses Inmarsat C-Codes to add metadata for distribution S-124 Envisioned operational set-up: new API VDES Service S-124 Plug-In NEXUS Traditional text- based warnings IHO, Monaco 4 8 September 2023

5. TEXT-BASED WARNING (CURRENT STATE) SECURITE SECURITE FM JRCC AUSTRALIA FM JRCC AUSTRALIA 112251Z JUL 2014 112251Z JUL 2014 Information included in human-readable text: General Area / Warning Type Warning Number Category of Warning Geometry Validity Period Further information ? NAVAREA X NAVAREA X 043/14 043/14 1. 1. HAZARDOUS OPERATIONS. HAZARDOUS OPERATIONS. SPACE DEBRIS ENTRY ENTRY 141423UTC TO 141705UTC JUL 14 141423UTC TO 141705UTC JUL 14 WITH AN ALTERNATE TIMEFRAME ALTERNATE TIMEFRAME 161338UTC TO 161620UTC 161338UTC TO 161620UTC JUL 14 JUL 14 IN PROJECTED AREA BOUNDED BY: IN PROJECTED AREA BOUNDED BY: SPACE DEBRIS RE RE- - WITH AN 39 39- -30S 106 30S 106- -10E, 10E, 43 43- -20S 116 20S 116- -30E, 30E, 44 44- -20S 116 20S 116- -00E, 00E, 40 40- -30S 105 30S 105- -45E, 45E, 39 39- -30S 106 30S 106- -10E. 10E. NNNN NNNN IHO, Monaco 4 8 September 2023

6. CHALLENGES IN INFORMATION EXTRACTION All relevant data is only contained in the text-based warning message Best solution would be an update of Nexus to support S-124 input mask for producing S-124 (and then generate old text-based warning automatically) Not feasible for trial project: Requires significant modification of safety-critical business processes Need to extract S-124 attributes from text- based warning on a best-effort basis IHO, Monaco 4 8 September 2023

7. APPROACH TO INFORMATION EXTRACTION Rule-based parsing of the message for simple attributes, e.g.: NAVAREA X 043/14 warningType = NAVAREA Navigational Warning warningNumber = 43 AI-based parsing (using OpenAI s gpt-3.5-turbo) in more complex cases: Category of Warning (19 general types, about 300 specific types) Validity period Geometry AI-assisted data set generation might be used for training or to increase efficiency of business processes (only under human-supervision) IHO, Monaco 4 8 September 2023

8. DATASET GENERATION Dataset Generation using Java JAXB and the GML Schemas from IHO: S-124 v1.0.0-draft S-100 v5.0.0 Dataset generation is automated and can be triggered via UI or REST-API Minimal implementation for testing: references, cancellation or multiple languages not supported, placeholder for metadata. S-124 example of ExchangeSet ExchangeSet includes digital signatures. IHO, Monaco 4 8 September 2023

9. SERVICE FOR THE PROVISION OF NW Data production is the first step, but we also need next- generation digital services for the provision of the data! International WG ( Open Digital Incubator Initiative ) progresses the specification and implementation of maritime services Development of a Technical Specification for the Provision of Navigational Warnings to End-users (WWNWS14-2-1-1-4) Service will use the Maritime Connectivity Platform for service discovery, reliable messaging and authentication (digital identities) IEC 63173-2 (SECOM) for secure data exchange IHO, Monaco 4 8 September 2023

10. DEMONSTRATION IHO, Monaco 4 8 September 2023

11. Thank you for your attention! Questions? Contact Julius Moeller Julius.Moeller@amsa.gov.au Ricky Withers Ricky.Withers2@amsa.gov.au Stuart Shepard Stuart.Shepard@amsa.go.au IHO, Monaco 4 8 September 2023