PDF Notes: DISPENSA PROF

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    What are geographic coordinates?

    They specify a location on the Earth's surface.

    What is the Mercator projection?

    It distorts size but preserves angles for navigation.

    How does magnetic declination affect navigation?

    It causes a difference between true north and magnetic north.

    What distinguishes rhumb line navigation from great circle navigation?

    Rhumb lines maintain a constant angle, while great circles represent the shortest path.

    What is estimated navigation?

    It involves calculating position based on speed, time, and distance.

    What is the purpose of nautical publications?

    They provide essential information for safe navigation.

    What is the role of the ship's captain during navigation?

    Responsible for the ship's safety and navigation decisions.

    What is a datum in navigation?

    A reference system for determining geographic coordinates.

    What is a nautical mile?

    It is based on the Earth's circumference, equal to 1.852 kilometers.

    How does the Earth's shape affect navigation calculations?

    It simplifies calculations by approximating the Earth as a sphere.

    What is the significance of the magnetic equator?

    It is where the magnetic field is horizontal.

    What is the difference between true course and magnetic course?

    True course is based on true north, while magnetic course uses magnetic north.

    What is the function of a speed log?

    It measures the vessel's speed through water.

    What does the term 'deviation' refer to in navigation?

    It is the error in compass readings caused by local magnetic fields.

    What is the purpose of compensating devices on a ship?

    To correct compass deviations for accurate navigation.

    What is the role of the compass in navigation?

    It indicates direction relative to magnetic north.

    What is the importance of monitoring during navigation?

    To ensure adherence to the planned course and make adjustments.

    What happens if a ship's course deviates significantly?

    It may lead to navigational errors and potential hazards.

    What is the function of a gyroscopic compass?

    It provides stable directional information unaffected by magnetic fields.

    What is the significance of the Greenwich Meridian?

    It serves as the prime meridian for global navigation.