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Unit 1: Navigation

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1. Dead Reckoning (DR) the process of estimating your position by advancing a known position using course, speed, time and distance to be traveled. – PowerPoint PPT presentation

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Title: Unit 1: Navigation


1
Unit 1 Navigation
2
What is Navigation?
  • Navigation is the process of monitoring and
    controlling the movement of a craft or vehicle
    from one place to another
  • It involves
  • Gathering information from sources
  • Evaluating the information
  • Making decisions based on the information

3
  • Navigation techniques vary with the type of
    vessel, conditions and the navigators experience
  • Navigation is both a science and an art that
    takes knowledge, skill and practice

4
Types of Navigation
  • There are 6 main types of navigation
  • Dead Reckoning
  • Piloting
  • Celestial Navigation
  • Radio Navigation
  • Radar Navigation
  • Satellite Navigation

5
1. Dead Reckoning (DR)
  • the process of estimating your position by
    advancing a known position using course, speed,
    time and distance to be traveled.

In other words figuring out where you will be at
a certain time if you hold the speed, time and
course you plan to travel.
6
2. Piloting
  • Piloting involves navigating in restricted waters
    with frequent determination of position relative
    to geographic and hydrographic features.
  • This method is used when in sight of land

7
3. Celestial Navigation
  • uses "sights," or angular measurements taken
    between a celestial body (the sun, the moon, a
    planet or a star) and the visible horizon to
    locate one's position on the globe, on land as
    well as at sea.

8
4. Radio Navigation
  • uses radio frequencies to determine position on
    Earth.
  • The basic principles are measurements from/to
    electric beacons, especially
  • Directions
  • Distances
  • Velocity (partly)

9
5. Radar Navigation
  • Uses a radar to determine the distance from or,
    bearing of, objects whose position is known.

10
6. Satellite Navigation
  • Uses artificial earth satellite systems, such as
    GPS, to determine position.

11
Maps Charts
12
Map
  • A map is a visual representation of an area
  • It represents selected features of the Earth's
    surface, drawn to scale.

13
Maps Include
  • The graphic representations on maps may consist
    of
  • Lines and symbols of various colors
  • Drawings of landforms
  • Photographs with the additions of lines and
    colors to emphasize features
  • Maps show land areas, political subdivisions, and
    topography.

14
Scale
  • Many, but not all, maps are drawn to a scale,
    expressed as a ratio such as 110,000
  • This means that 1 of any unit of measurement on
    the map corresponds to 10,000 of that same unit
    on the ground.

15
Political vs Physical Maps
  • Most maps of the world or large areas are either
    political or physical
  • Political maps show territorial borders
  • Physical maps show features of geography such as
    mountains, soil type or land use

16
Political Map of Canada
17
Physical Map of Canada
18
Charts
  • A chart is a special-purpose map, generally
    designed for a form of navigation, such as sea
    navigation.
  • A nautical chart is a graphic representation of a
    sea area and adjacent coastal regions.

19
  • Depending on the scale of the chart, it may show
  • Depths of the water
  • Heights of land
  • Natural features of the seabed
  • Details of coastline
  • Navigational hazards
  • Locations of natural and man-made navigational
    aids

20
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