GEN 2: Tables and Codes ▶ GEN 2.1 Measuring System, Aircraft Markings, and Holidays 1. Units of Measurement 2. Time System 3. Geodetic Reference Datum 4. Vertical Reference System 5. Aircraft Nationality and Registration Marks 6. Public Holidays ▶ GEN 2.2 Abbreviations Used in AIS Publications GEN 2.2: Abbreviations Used in AIS Publications ▶ GEN 2.3 Chart Symbols GEN 2.3: Chart Symbols ▶ GEN 2.4 Location Indicators GEN 2.4: Location Indicators ▶ GEN 2.5 List of Radio Navigation Aids GEN 2.5: List of Radio Navigation Aids ▶ GEN 2.6 Conversion Tables GEN 2.6: Conversion Tables ▶ GEN 2.7 Sunrise/Sunset Tables GEN 2.7: Sunrise/Sunset Tables