Podcast
Questions and Answers
Who is primarily responsible for the safe navigation of the vessel?
Who is primarily responsible for the safe navigation of the vessel?
When relieving the helm, what must the new helmsman be aware of?
When relieving the helm, what must the new helmsman be aware of?
What is the immediate action required when a crew member falls overboard?
What is the immediate action required when a crew member falls overboard?
What must a report of casualty to a vessel include?
What must a report of casualty to a vessel include?
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Which situation requires a notice of marine casualty to be furnished to the coast guard?
Which situation requires a notice of marine casualty to be furnished to the coast guard?
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What term describes the visibility of lights indicated in the charts in nautical miles?
What term describes the visibility of lights indicated in the charts in nautical miles?
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What type of projection does a Mercator Chart utilize?
What type of projection does a Mercator Chart utilize?
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Which chart symbol denotes that the bottom is coral?
Which chart symbol denotes that the bottom is coral?
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What publication provides ocean current information for voyage planning from Tokyo to San Francisco?
What publication provides ocean current information for voyage planning from Tokyo to San Francisco?
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What altitude is referred to after applying the Dip and index error?
What altitude is referred to after applying the Dip and index error?
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What type of observations does a phase correction apply to?
What type of observations does a phase correction apply to?
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When navigating using DGPS, what is the expected position accuracy within a radius of __________ meters?
When navigating using DGPS, what is the expected position accuracy within a radius of __________ meters?
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What is the term for the angle between the grid and magnetic meridians?
What is the term for the angle between the grid and magnetic meridians?
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What is the phenomenon that occurs when the axis of an object wobbles due to applied torque?
What is the phenomenon that occurs when the axis of an object wobbles due to applied torque?
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What error occurs in a gyrocompass due to rapid changes in course and speed?
What error occurs in a gyrocompass due to rapid changes in course and speed?
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Which statement correctly describes the function of the Flinders bar on a magnetic compass?
Which statement correctly describes the function of the Flinders bar on a magnetic compass?
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If a vessel's heading is 330 degrees pgc and 345 degrees psc with a 2 degrees E gyro error, what is the deviation with a variation of 10 degrees W?
If a vessel's heading is 330 degrees pgc and 345 degrees psc with a 2 degrees E gyro error, what is the deviation with a variation of 10 degrees W?
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What is the shortest distance between any two points on Earth known as?
What is the shortest distance between any two points on Earth known as?
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Which type of chart covers a large area?
Which type of chart covers a large area?
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Isogonic lines on a chart indicate what?
Isogonic lines on a chart indicate what?
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Where is the revision of a chart typically printed?
Where is the revision of a chart typically printed?
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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?
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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?
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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 __________.
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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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When water salinity increases, what happens to the speed of sound?
When water salinity increases, what happens to the speed of sound?
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What is the nature of the beam transmitted by an echo sounder?
What is the nature of the beam transmitted by an echo sounder?
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Which of these is an echo sounder transducer type?
Which of these is an echo sounder transducer type?
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What unit measures the speed of sound in water?
What unit measures the speed of sound in water?
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What is the standard atmospheric pressure in millimeters of mercury?
What is the standard atmospheric pressure in millimeters of mercury?
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What should you do FIRST if you notice your vessel's course is slowly changing to the right while the gyro-pilot is engaged?
What should you do FIRST if you notice your vessel's course is slowly changing to the right while the gyro-pilot is engaged?
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How many degrees north of the Tropic of Cancer is the Arctic Circle?
How many degrees north of the Tropic of Cancer is the Arctic Circle?
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What is the automatic device for steering a vessel called?
What is the automatic device for steering a vessel called?
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What is the length of a nautical mile?
What is the length of a nautical mile?
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The interval between the sun's upper limb being on the horizon and its center being 12 degrees below is called what?
The interval between the sun's upper limb being on the horizon and its center being 12 degrees below is called what?
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What is the color configuration of an East Cardinal Mark under the IALA Buoyage System?
What is the color configuration of an East Cardinal Mark under the IALA Buoyage System?
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Which of the following does NOT typically belong in the tables that a mariner must refer to during voyage planning?
Which of the following does NOT typically belong in the tables that a mariner must refer to during voyage planning?
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Study Notes
STO Competency 1 - Assessment Questionnaire
- Position Obtained by Course and Speed: Dead-reckoning position.
- Position with Current and Wind: Estimated position.
- Barometric Pressure Conversion: 29.92 inches of mercury = 1013.25 millibars.
- Apparent Altitude Correction: Involves inaccuracies in reading and reference level, double-second difference, chronometer error, and latitude difference.
- Rotary Tidal Current Data Source: Tidal Current Tables.
- Speed of Sound in Water: 1.5 kilometers per second.
- Echo Sounder Frequency: 24 kHz (low frequency).
- Echo Sounder Marking Device: Event marker.
Nautical Chart and Navigation
- Large Area Chart: General chart.
- Isogonic Lines: Lines on a chart indicating points of equal variation.
- Chart Revision Location: Lower left center.
- Light Visibility Units: Nautical miles.
- Mercator Chart Type: Cylindrical projection.
- Water Salinity and Sound Speed: Increased salinity leads to increased speed of sound.
Position Fixing, Gyrocompass and Errors
- Vessel Heading with Gyro Error and Variation: Deviation of heading is calculated using the given values.
- Gyrocompass Error: Stream error, variation error, deviation error, related to quick course, speed and latitude changes.
- Magnetic Compass Bar: Used to compensate vertical magnetic errors.
- Grid Variation: Angle between grid and magnetic meridians.
Other Navigation Topics
- Ocean Current Information Publication Sailing Directions.
- Phase Correction Applied To: Stars.
- GPS Accuracy: 95% accuracy within 100 meters.
- DGPS Accuracy: Typically within 10 meters.
- Instrument for Direction Measurement: Compass and Pelorus.
- Compass Rose Details: Includes variation and deviation.
- Standard Atmospheric Pressure: 760 mm Hg.
- Navigational Errors: Dip and index error applied to apparent altitude.
- Vessel Steering Change: Notify the Master.
Notice of Marine Casualty
- Situation Requiring Coast Guard Notice: Vessel damage, groundings in low tide, and collision incidents.
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Description
Test your knowledge on nautical navigation and assessment techniques with this comprehensive quiz. Covering topics from dead-reckoning positions to sound speed in water, this quiz is essential for those in maritime studies. Assess your understanding of important nautical concepts and measurements.
