Navigation Quiz 2

• Maritime Safety Information


  Includes navigational and meteorological warnings, meteorological forecasts, warnings about dangers to navigation, warnings of missing vessels and other urgent messages pertaining to the safety of the vessel and its crew
• NAVTEX


  A device used on-board the vessels to provide short range Maritime Safety Information in coastal waters automatically
• NAVTEX


  • Can be used in ships of all types and sizes
  • The area covered by Navtex can extend as far as 400 nautical miles from the broadcast station
  • A NAVTEX receiver onboard prints out navigational and meteorological warnings and forecasts as well as urgent Marine Safety Information to ships
• NAVTEX


  Forms a vital element of the Global Maritime Distress Safety System (GMDSS)
• NAVTEX


  Uses the feature of radio telex or Narrow Band Direct Printing (NBDP) for the automatic broadcast of information
• 490 kHz frequency


  Also used by some countries for broadcasts in the national languages, also known as national navtex
• Where medium frequency reception is difficult


  Transmissions are made on 4209.5 kHz
• Default setting in a Navtex

  518 kHz in medium frequency band
• NAVAREAS


  The entire world is divided into 21 areas for the purpose of distributing this information
• NAVTEX message types


  • A= Navigational Warning
  • B= Meteorological Warning
  • C= Ice report
  • D= Search and Rescue Information/ Piracy and Armed Robbery
  • E= Meteorological forecast
  • F= Pilot messages
  • G= AIS messages(formerly Decca messages)
  • H= Loran C messages
  • I= Omega messages
  • J= Satnav messages (GPS or GLONASS)
  • K= Other electronic navigational aid system messages
  • L= navigational warnings (additional)
  • M to U= Reserve
  • V= Notice to fisherman
  • W to Y= Reserve
  • Z= No messages on hand
• Navtex receiver


  Can be set to ignore certain types of messages, however, messages A,B,D and L because of their importance cannot be rejected by navigating officers
• Audible alarms


  Can also be generated when message type A,B,D or L is received, and should only be possible to reset this alarm manually
• When programming the type of messages to receive, it is wise to ensure that only those which are required and necessary are programmed for the reception</b>
• How seafarers plot the navigational warnings on the chart


  1. Identifying the Warning

  2. Locating the Position

  3. Adding Information

  4. Updating Chart Corrections
• Chart symbols used commonly for Navigational Warnings


  • Wreck
  • Obstruction
  • Rock
  • Isolated Danger
  • Buoy
  • Light
  • Sound Signal
  • Submarine Cable
  • Offshore Installation
  • Restricted Area
• A


  Navigational Warning
• B


  Meteorological Warning
• C


  Ice Report
• D


  Search and Rescue Information/Piracy and Armed Robbery
• E


  Meteorological Forecast
• F


  Pilot Messages
• G


  AIS Messages(formerly Decca Messages)
• H


  Loran C messages
• I


  Omega Messages
• J


  Satnav messages (GPS or GLONASS)
• K


  Other electronic navigational aid system messages
• L 


  navigational warnings (additional)
• M to U (1)


  Reserve (1)
• V


  Notice to Fisherman
• W to Y (2)


  Reserve (2)
• Z


  No messages on hand