Podcast
Questions and Answers
What is the position obtained by applying only your vessel's course and speed to a known position?
What is the position obtained by applying only your vessel's course and speed to a known position?
- Probable position
- Applied position
- Dead-reckoning (correct)
- Fix
A barometric pressure reading of 29.92 inches of mercury is equivalent to __________.
A barometric pressure reading of 29.92 inches of mercury is equivalent to __________.
- 1013.25 millibars (correct)
- 1015.25 millibars
- 1012.35 millibars
- 1010.35 millibars
What is the position obtained by applying estimated current and wind to your vessel's course and speed?
What is the position obtained by applying estimated current and wind to your vessel's course and speed?
- Estimated position (correct)
- Assumed position
- Applied position
- Dead-reckoning position
Apparent altitude is sextant altitude corrected for __________.
Apparent altitude is sextant altitude corrected for __________.
What is the position obtained by applying only your vessel's course and speed to a known position?
What is the position obtained by applying only your vessel's course and speed to a known position?
Where can the data relating to the direction and velocity of rotary tidal currents be found?
Where can the data relating to the direction and velocity of rotary tidal currents be found?
What is the position obtained by applying estimated current and wind to your vessel's course and speed?
What is the position obtained by applying estimated current and wind to your vessel's course and speed?
A barometric pressure reading of 29.92 inches of mercury is equivalent to __________.
A barometric pressure reading of 29.92 inches of mercury is equivalent to __________.
Apparent altitude is sextant altitude corrected for __________.
Apparent altitude is sextant altitude corrected for __________.
Where can the data relating to the direction and velocity of rotary tidal currents be found?
Where can the data relating to the direction and velocity of rotary tidal currents be found?
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Study Notes
Navigation Concepts
- The position obtained by applying only vessel's course and speed to a known position is termed Dead Reckoning Position.
- The estimated position factoring in current and wind effects is referred to as Estimated Position.
Barometric Pressure
- A barometric pressure reading of 29.92 inches of mercury is equivalent to 1013.25 hPa (hectopascals) or 1 atmosphere (atm).
Apparent Altitude
- Apparent altitude is sextant altitude corrected for refraction and parallax.
Tidal Currents
- Data relating to the direction and velocity of rotary tidal currents can be found in Tidal Current Tables or published charts from nautical sources.
Summary of Positioning Techniques
- Dead Reckoning Position is a navigation method using known speed and course, while Estimated Position factors in environmental influences such as currents and winds for more accuracy.
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