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  7/6/2021 11:59 AM        <dir> 1 Electronic aids to Navigation
  7/6/2021 11:59 AM        <dir> 10 Integrated navigation systems
  7/6/2021 11:59 AM        <dir> 11 The ship compass
  7/6/2021 11:59 AM        <dir> 11 The ship's compass
  7/6/2021 11:59 AM        <dir> 12 Automatic steering
  7/6/2021 12:00 PM        <dir> 13 Radio direction finding
  7/6/2021 12:00 PM        <dir> 14 Global maritime distress and safety system (GMDSS)
  7/6/2021 12:00 PM        <dir> 15 The NAVTEX system
  7/6/2021 12:00 PM        <dir> 16 Appendix 1  Radio waves, propagtion and ionosphere
  7/6/2021 12:00 PM        <dir> 17 Appendix 2  Doppler effect
  7/6/2021 12:00 PM        <dir> 18 Appendix 3  Zilog z80 terminology
  7/6/2021 12:00 PM        <dir> 19 Index
  7/6/2021 12:00 PM        <dir> 2 Preface
  7/6/2021 12:00 PM        <dir> 3 Contents
  7/6/2021 12:00 PM        <dir> 4 Sonar navigation
  7/6/2021 12:00 PM        <dir> 5 Speed measurement
  7/6/2021 12:00 PM        <dir> 6 Decca navigator
  7/6/2021 12:00 PM        <dir> 7 Loran-C
  7/6/2021 12:00 PM        <dir> 8 Omega
  7/6/2021 12:01 PM        <dir> 9 Navigation by satellite