Radar
Chart plotter
Sounder
AIS
GPS
100

What does RADAR mean?

Radio Detection and Ranging

100

What is North up?

Shows the chart with true north at the top screen

100

The Transducer must be carefully ………………………..

Sited and kept clean of paint, oil and sea growth. Must identify minimum of 2

100

What does AtoN mean?

Aids to Navigation

100

What does COG mean?

Course over ground

200

Give 2 main uses for a radar

Position fixing and collision avoidance

200

What is Head up?

Shows the chart with your heading at the top of the screen

200

What are the 4 components of echo sounder?

Transmitter, transducer, receiver amplifier and timebase/display. Must identify any 2

200

What does ECDIS mean?

Electronic Chart Display and Information System

200

What does SOG mean?

Speed over ground

300

You have a radar target at a range of 6 miles on your starboard bow, when you hear a fog signal forward of the beam, What are you actions?

Slow down to mere steerage way

300

What is the purpose of chart plotter?

Chart plotter allows you to accurately place yourself on the chart and track your speed and direction.

300

Name 3 errors that can affect Echo Sounder readings

Temperature, salinity or pressure changes

300

What does FATDMA mean?

Fixed Access Time Division Multiple Access

300

What does XTE mean?

Cross-track error

400

Range discrimination is the ability of the radar to distinguish between two targets:

On the same bearing but slightly different ranges

400

What is a common mistake with Chart plotters?

Accidentally read off the plotters cursor position instead of vessels actual position.

400

What are sounders used for?

To determine water depth, the presence of fish and the nature of bottom structure

400

What are the limitations of AIS on ships? Name 2

  1. The accuracy of AIS information received is only as good as the accuracy of the AIS information transmitted

  2. The position received on the AIS display might not be referenced to the WGS 84 datum

  3. Over-reliance on the AIS can cause complacency on the part of the OOW

  4. Users must be aware that the AIS might transmit erroneous information from another ship

  5. Not all ships are fitted with AIS

  6. The officer in charge of the watch should be aware that AIS, if installed, can be disabled by a particular ship, thereby nullifying any information that may have been obtained from that ship.
400

What does Part 25 of the Maritime rules state?

It is a legal requirement for commercial vessels to carry the appropriate paper charts and nautical publication for there area of operation.

500

You are in restricted visibility and have plotted a target on your port bow and determined that the approaching vessel is on a collision course. What must you must do?

Alter course to starboard or reduce speed or stop

500

What is Selective availability?

Intentional downgrading in accuracy.

500

A ship sends on a high frequency sound wave and receives an echo after 1 second. What is the depth of the sea? Speed of sound in water is 1500 m/s :

750 metres

500

What is Maritime Mobile Service Identities (MMSIs)?

MMSI is a nine-digit numbers used by maritime digital selective calling (DSC), automatic identification systems (AIS) and certain other equipment to uniquely identify a ship or a coast radio station.

500

What does GNSS mean?

Global Navigation Satellite System

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