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

When considering a Navstar GPS receiver the output course and speed, provided by the receiver, provides what information?

A The course and speed over the ground.

B The course steered and the log speed.

C The course and speed through the water.

D The gyro course and the Doppler speed.

Питання 2

What is “Jamming” when referred to GNSS?

A Jamming is the intentional blocking of the satellite signals.

B Jamming is the interference of one satellite signal to another.

C Jamming is the atmospheric interference of the satellite signals.

D Jamming is the problem associated with two satellite signals arriving at the receiver at the same time.

Питання 3

Why is it considered dangerous to totally rely on the Navstar GPS for obtaining positions?

A Because it is not 100 % reliable.

B It is not dangerous to totally rely on GPS.

C Because there are other methods, that can be used for finding positions.

D Because the GPS is now being degraded by Selective Availability.

Питання 4

What types of Global Navigation Satellite Systems (GNSS) receivers are used at sea for navigational purposes?

A Navstar GPS, GLONASS, and combined Navstar GPS and GLONASS, while other GNSS are under development.

B Only Navstar GPS.

C Only the Global Positioning System.

D Combined Navstar GPS and Decca navigator receivers.

Питання 5

When considering Navstar GPS receiver, what is the minimum number of satellites, that must be available to calculate a 3 Dimensional (latitude, longitude and altitude) position?

A 4.

B 2.

C 3.

D 5.

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