Semaphore Navigation
Cards (47)
- Near shore navigation
- Latest well determined position
- Collecting info, use electronic devices
- Sun, moon, planet, stars
- True sphere/ ablate spheroid
- Diameter about which earth rotates
- Circle on surface of earth
- The plane which does not pass center
- Great circle, equidistant to poles
- Origin of measurement of longitude
- Passes through poles
- Angular distance northward/southward
- Eastward/ westward
- Angular inclination
- Intended direction
- Ship points or heads
- Direction of terrestrial object
- Velocity of travel express in knots
- 1knot / 1 minute of angular measurement
- External to vessel, assist navigator
- Man made permanent fixture
- Lighthouse but unwatched
- Continuous steady light
- Single flash, regular interval
- Two or more flashes
- Less than 60 flash per minute
- Quick flash 4 sec with 4 sec of darkness
- 0.4 to 4 seconds
- Hroup of 2 more eclipse
- Standard colors of lights WRG
- Range of visibility
- Shape of tin cylinder
- Truncated cone
- Compressed gasses
- Slightly tapering pole
- 4 gongs
- Cone shaped, whistles
- Batteries or gas tanks, skeleton tower
- Light/ sound signal
- Radar reflector