Bridge Navigation & Deck Operations

DGPS / GNSS Navigation Systems

Test your knowledge of modern satellite navigation systems .This quiz covers GPS, DGPS and GNSS fundamentals, including positioning accuracy, satellite signals, common errors, RAIM, HDOP, chart datums, and safe navigation practices. Designed for cadets, deck officers and maritime professionals.

Питань 18

Час 9 min

Мова Англійська

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Питання 1

Global Navigation Satellite Systems (GNSS) provides three services known collectively as PNT, what are they?

A Position, Navigation and Timing.

B Position, Navigation Data and Time.

C Precision, Navigation and Time.

D Position, Nautical and Terrestrial.

Питання 2

With reference to Navstar GPS system used in conjunction with a Differential Reference Station, on what is the accuracy of the resultant position mainly dependant?

A The distance between the observer and the reference station.

B The relative angle between the satellites.

C The number of satellites available.

D The price of the equipment.

Питання 3

What datum is used by the HO approved vector charts, as used by the Navstar GPS system?

A WGS84.

B OSGB.

C MHWS.

D PZ-90.

Питання 4

GLONASS is an alternative to what system?

A Navstar GPS.

B Receiver for Navstar GPS.

C e-Loran.

D Satellite Tracking Stations.

Питання 5

What is the reason for “clock error” with reference to the Navstar GPS system?

A The difference between the time at the satellite clock and the time at the receiver clock.

B The delay in the signal from leaving the satellite to reaching the receiver.

C The error due to the interference of the ionosphere.

D The difference of the receiver time and the Universal Standard Time.

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