Podcast
Questions and Answers
What is the speed of the wind in a beaufort force 8?
What is the speed of the wind in a beaufort force 8?
- Wind speed 41 to 47 knots mean 44 knots
- Wind speed 48 to 55 knots mean 52 knots
- Wind speed 34 to 40 knots mean 37 knots (correct)
- Wind speed 28 to 33 knots mean 30 knots
If the center of low is directly ahead, what is the wind speed?
If the center of low is directly ahead, what is the wind speed?
- 1.9 knots
- 2.1 knots (correct)
- 2.3 knots
- 1.7 knots
How often are Notice to Mariners published?
How often are Notice to Mariners published?
- Annually
- Monthly (correct)
- Weekly
- Quarterly
What is the nature of the beam transmitted by an echo sounder?
What is the nature of the beam transmitted by an echo sounder?
What is the shape of the Starboard hand lateral marks used in IALA Region B?
What is the shape of the Starboard hand lateral marks used in IALA Region B?
What is the effect of low humidity on evaporation?
What is the effect of low humidity on evaporation?
What does a type of cloud at a low angle of elevation represent?
What does a type of cloud at a low angle of elevation represent?
How do sea ice and icebergs move in an area where they are present?
How do sea ice and icebergs move in an area where they are present?
How can RADAR be an aid to weather forecasting?
How can RADAR be an aid to weather forecasting?
What is the purpose of a detailed passage plan in coastal navigation?
What is the purpose of a detailed passage plan in coastal navigation?
What is the characteristic of an iceberg compared to sea ice?
What is the characteristic of an iceberg compared to sea ice?
What is the result of increasing the height in feet above sea level by 10 percent and dividing by 30?
What is the result of increasing the height in feet above sea level by 10 percent and dividing by 30?
What is the characteristic of a cloud with a 2000 feet thickness?
What is the characteristic of a cloud with a 2000 feet thickness?
What is the purpose of a device that requires four sphere of position lines?
What is the purpose of a device that requires four sphere of position lines?
What is the result of increasing the height in feet above sea level by 5 percent and dividing by 20?
What is the result of increasing the height in feet above sea level by 5 percent and dividing by 20?
What is the characteristic of a cloud with a 4000 feet thickness?
What is the characteristic of a cloud with a 4000 feet thickness?
What is the purpose of a device that measures the temperature of the atmosphere?
What is the purpose of a device that measures the temperature of the atmosphere?
What is the importance of a triangle formed by three position lines?
What is the importance of a triangle formed by three position lines?
What is the measurement of the angle between the horizontal and magnetic line of force?
What is the measurement of the angle between the horizontal and magnetic line of force?
What is the minimum under keel clearance required over a rock of drying height 0.9 meters, given the vessel's draught is 2.5 meters and the height of HW is 3.8 meters?
What is the minimum under keel clearance required over a rock of drying height 0.9 meters, given the vessel's draught is 2.5 meters and the height of HW is 3.8 meters?
What is the term for the ratio of the existing water vapour to its saturation value at the same temperature?
What is the term for the ratio of the existing water vapour to its saturation value at the same temperature?
What is the instrument that measures the temperature to which air must be cooled at constant pressure and constant water vapour content?
What is the instrument that measures the temperature to which air must be cooled at constant pressure and constant water vapour content?
What is the term for the error that occurs when a vessel's position is plotted at the point of intersection of the line outside the triangle?
What is the term for the error that occurs when a vessel's position is plotted at the point of intersection of the line outside the triangle?
What is the type of beam that follows a hyperbolic path?
What is the type of beam that follows a hyperbolic path?
What is the purpose of a drybulb thermometer?
What is the purpose of a drybulb thermometer?
What is the projection that is used to preserve angles and shapes?
What is the projection that is used to preserve angles and shapes?
What is the stage of the water cycle where water vapor in the air gets cold and condenses?
What is the stage of the water cycle where water vapor in the air gets cold and condenses?
What is the unit of measurement used to describe the accuracy of tide tables?
What is the unit of measurement used to describe the accuracy of tide tables?
What is the shape of the crystal formed in a conical, pillar or spar crystal system?
What is the shape of the crystal formed in a conical, pillar or spar crystal system?
Study Notes
Determining the Center of Low Pressure
- To determine the center of low pressure, consider the wind direction and speed, as well as the movement of the low-pressure system.
Magnetic Properties
- The ability of a substance to retain magnetic properties after the magnetizing force has been removed is known as magnetic remanence.
Navigation
- Notice to Mariners is published monthly, bi-monthly, or weekly, depending on the region.
- The variation of a compass can be calculated if the true heading and magnetic heading are known.
- The shape of the starboard hand lateral mark in IALA Region B is a pillar or spar, cylindrical, or spherical.
Astronomy
- 21 out of 57 navigational stars tabulated in the Nautical Almanac are of the first magnitude.
- Polaris appears due north in the sky with a precision better than 1 degree.
Chart Projections
- A chart projection depicting the poles and small areas on either side of a connecting meridian is sometimes used for star charts.
- Transverse Mercator projection, Azimuthal Gnomonic projection, Lambert Conformal projection, and Polyconic projection are different types of chart projections.
Water Cycle
- Precipitation is the part of the water cycle when clouds get heavy and can no longer hold the liquid water.
- Condensation is the part of the water cycle when the water vapor in the air gets cold.
Meteorology
- A dry-bulb thermometer is used to measure the temperature of the atmosphere.
- Relative humidity is the ratio of the existing water vapor in the air to its saturation value at the same temperature.
- An anemometer measures the wind speed and direction.
- A psychrometer measures the relative humidity.
Position Fixing
- If three position lines intersect in a triangle, the vessel's position can be plotted.
- If the lines do not intersect, the vessel's position cannot be determined.
Errors in Position Fixing
- Heeling error, pitching error, and local error are types of errors that can occur in position fixing.
Clouds and Weather
- A sign of instability which may give rise to bad weather with strong winds is a cumulonimbus cloud.
- Rainy weather with strong winds may be preceded by bad weather signs.
- A thickness of 2000-4000 feet allows cloud tops to be lower than the freezing level.
Icebergs and Sea Ice
- Icebergs and sea ice will move in approximately the same direction and at the same speed.
- When operating in an area where sea ice and iceberg are present, a detailed passage plan should be developed.
RADAR and Weather Forecasting
- RADAR can be an aid to weather forecasting, especially when weather messages are incomplete or not available.
- Showers at close range appear on the screen only if moderate or heavy rain falls.
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Description
Test your knowledge of the Beaufort scale, a system used to measure wind speed, and find out the speed of the wind in a Beaufort force 8. This quiz is perfect for meteorology enthusiasts and those interested in weather forecasting. See how well you can gauge the wind speed!
