Summary of NAVIGAZIONE parte 1 - lez. 9

Summary of "NAVIGAZIONE parte 1 - lez. 9"

In this lesson, the instructor Chiara discusses essential concepts of cartographic and electronic navigation, focusing on terrestrial geographical references, Nautical Charts, and GPS Navigation.

Main Ideas and Concepts:

• Geographical References:
  • Equator: Divides the Earth into Northern and Southern Hemispheres; serves as the reference for calculating latitude.
  • Greenwich Meridian: Established for political reasons, serves as the reference for calculating longitude.
  • Poles: North and South poles where all geographical meridians converge.
• Latitude and Longitude:
  • Latitude: Angular distance from the Equator, ranging from 0° at the Equator to 90° at the poles.
  • Longitude: Angular distance from the Greenwich Meridian, ranging from 0° to 180° east or west.
  • Both Latitude and Longitude are measured in degrees, minutes, and seconds (sexagesimal system).
• Nautical Charts:
  • Nautical Charts display geographical features, water depths, and navigational aids.
  • Latitude scales are on the sides, while longitude scales are at the top and bottom.
  • Charts are produced by the Hydrographic Institute of the Navy in Italy and must be updated for navigation.
• Mercator Projection:
  • A map projection used for navigation that distorts landmasses as they move away from the Equator.
  • Allows for straight-line navigation at constant angles but distorts distances, especially at higher latitudes.
• GPS Navigation:
  • GPS is essential for determining a vessel's position, course, speed, and arrival time.
  • The system uses satellites to triangulate the boat's position, providing accurate Latitude and Longitude.
  • Waypoint Navigation: Involves setting multiple waypoints for navigation.
  • MOB Function: A critical feature for man-overboard situations that saves the position of the person in the water.

Methodology and Instructions:

• Understanding Latitude and Longitude:
  • Measure latitude as the angular distance from the Equator.
  • Measure longitude as the angular distance from the Greenwich Meridian.
• Using Nautical Charts:
  • Identify Latitude and Longitude scales on the chart.
  • Use the scale to measure distances accurately based on the latitude of the area.
• Navigating with GPS:
  • Set waypoints for navigation and monitor the course.
  • Familiarize the crew with the MOB function to ensure quick response in emergencies.

Speakers/Sources Featured:

• Chiara: Main instructor providing the lesson on navigation concepts.

Notable Quotes

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Educational

Video