Semaphore Navigation

Cards (47)

  • Near shore navigation
    Piloting
  • Latest well determined position
    Dead reckoning
  • Collecting info, use electronic devices
    Electronic navigation
  • Sun, moon, planet, stars
    Celestial navigation
  • True sphere/ ablate spheroid
    Earth
  • Diameter about which earth rotates
    Axis
  • Circle on surface of earth
    Great Circles
  • The plane which does not pass center
    Small circle
  • Great circle, equidistant to poles
    Equator
  • Origin of measurement of longitude 

    Prime Meridians
  • Passes through poles
    Meridians
  • Angular distance northward/southward

    Latitude
  • Eastward/ westward
    Longitude
  • Angular inclination
    Direction
  • Intended direction 

    Course
  • Ship points or heads

    Heading
  • Direction of terrestrial object
    Bearing
  • Velocity of travel express in knots
    Speed
  • 1knot / 1 minute of angular measurement
    6, 080.2 ft/ hr , 2000 yards
  • External to vessel, assist navigator

    Aids to navigation
  • Man made permanent fixture
    Lighthouse
  • Lighthouse but unwatched
    Lighted beacons
  • Continuous steady light
    Fixed light
  • Single flash, regular interval
    Flashing lights
  • Two or more flashes

    Group flashing
  • Less than 60 flash per minute 

    Quick flashing
  • Quick flash 4 sec with 4 sec of darkness
    Interrupted quick flashing
  • 0.4 to 4 seconds

    Short long flashing
  • Hroup of 2 more eclipse
    Group occulting
  • Standard colors of lights WRG
    WHITE RED GREEN
  • Range of visibility
    Brilliancy
  • Shape of tin cylinder
    Can buoy
  • Truncated cone
    Nun buoy
  • Compressed gasses

    Bell buoy
  • Slightly tapering pole
    Spar buoy
  • 4 gongs

    Gong buoy
  • Cone shaped, whistles
    Whistle buoy
  • Batteries or gas tanks, skeleton tower
    Lighted buoy
  • Light/ sound signal

    Combination buoy
  • Radar reflector
    Radar reflected buoy