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WorksheetsNAVI
Total questions: 80
Worksheet time: 55mins
It is a field of study that focuses on the process of monitoring and controlling the movement of a craft or vehicle.
(a)
It is the art and science of determining the position of a ship, plane or other vehicle, and guiding it to a specific destination.
(a)
It refers to the instruments used by nautical navigators and pilots as tools of their trade.
(a)
It is a forms of navigation that ships, land vehicles, and people can use, which rely on technology powered by electricity.
(a)
It is a detection system that uses radio waves to determine the range, angle, or velocity of objects.
(a)
S-band
10cm
5cm
15cm
20cm
X-band
3cm
6cm
9cm
12cm
It is a type of non-magnetic compass which is based on a fast-spinning disc and the rotation of the to find geographical direction automatically.
(a)
It is the use of an automatic system to control the rudder on the vessel.
(a)
It displays the position of a ship and other vessels nearby.
(a)
ARPA
(a)
Also known as ship logs, chip logs, or common logs, measure the speed of a vessel.
(a)
Transmit a pulse of acoustic energy down towards the seabed and measure the total time taken for it to travel through the water.
(a)
Sends sound wave pulses from a transducer that's usually located on the bottom of a ship/boat's hull.
(a)
ECDIS
Electronic Chart Display Information System
Electronic Chart Device Information System
Electronical Chart Display Information System
Electronical Chart Device Information System
It is a computer-based navigation system that complies with IMO regulations and can be used as an alternative to paper navigation charts.
LRIT
ARPA
AIS
It is an automated tracking system that displays other vessels in the vicinity.
LRIT
ARPA
AIS
AIS
(a)
It is a system requiring vessels to automatically transmit their identity, position and the date/time every six hours.
LRIT
ARPA
AIS
LRIT
Long-range Identification and Tracking
Long-range Identification and Track
Long-range Information and Tracking
Long-range Information and Track
It is a device used to indicate the present position of the rudder blade, usually fitted in the wheelhouse, bridge wings and engine control room.
(a)
It is an equipment fitted onboard ships that record the various data on a ship which can be used for reconstruction of the voyage details and vital information during an accident investigation.
(a)
The rate a ship is turning is measured in degrees per minute. This essential tool assists a coxswain in steering a course safely.
(a)
Provides the fastest and most accurate method for mariners to navigate, measure speed, and determine location.
GPS
AIS
LRIT
ARPA
GPS
(a)
It is a acoustical-electronic navigational aids to enable the officer of the watch to hear outside sound signals inside a totally enclosed bridge.
(a)
It gives information on a craft's position, heading, and status.
(a)
To monitor bridge activity and detect operator disability which could lead to marine accidents.
BNWAS
VHF & MF/HF
BNWAS
Bridge Navigational Watch & Alarm System
Bridge Navigation Watch & Alarm System
Bridge Navigational Watch & Alarm Support
Bridge Navigation Watch & Alarm Support
It helps in times of bad weather condition and poor visibility, when alerting the nearby ship becomes imperative.
(a)
The whistle should be both manually and electrically operational from the bridge.
True
False
It depends
None of the above
It is a bridge equipments which are used for the communication purpose.
Radio
ECDIS
ARPA
It can be used for the shorter range up to 50 nautical miles.
(a)
It can be used for the larger range up to 200 nautical miles.
(a)
It records the course as well as it has the date and time stamp at frequent intervals.
(a)
It is the system provided on bridge to control and change the course steered by the vessel.
(a)
Power on the GPS device
1st step
2nd step
3rd step
4th step
Wait for Satellite Acquisition
1st step
2nd step
3rd step
4th step
Check Signal Strength
1st step
2nd step
3rd step
4th step
Select Display Mode
1st step
2nd step
3rd step
4th step
Set Alarms and Alerts (Optional)
5th step
6th step
7th step
8th step
Monitor Navigation Data
5th step
6th step
7th step
8th step
Update Information
5th step
6th step
7th step
8th step
Emergency Procedures
5th step
6th step
7th step
8th step
Backup Systems
9th step
10th step
Always refer to the device’s user manual.
True
False
The lower the number, the better the signal.
True
False
PDOP
(a)
HDOP
(a)
WGS84
The World Geodetic System 1984
The World Geographic System 1984
The World Geodetical System 1984
The World Geographical System 1984
NAD83
North American Datum of 1983
North American Declivity of 1983
North American Deictic of 1983
North American Drive of 1983
°
Degrees
Minutes
Seconds
’
Degrees
Minutes
Seconds
”
Degrees
Minutes
Seconds
It is measured North and South from the Equator.
Latitude
Longitude
It is measured East and West from the Prime Meridian.
Latitude
Longitude
It is a drafting instrument used by navigators to draw parallel lines on charts.
Parallel Ruler
Dividers
Triangles
Measuring the distance between two points on a chart is made easier with it.
Parallel Ruler
Dividers
Triangles
Tools used by navigators to plot courses and transfer compass bearings within a nautical chart.
Parallel Ruler
Dividers
Triangles
Who is the German inventor of Echo Sounder?
(a)
Echo Sounder were developed in the early ___
1920’s
1940’s
1900’s
1960’s
Is a type of sonar used to determine the depth of water by transmitting sound waves into water.
(a)
Echo Sounder is also called
(a)
Sonar is originally an acronym for
SOund Navigation And Ranging
SOund Navigational And Ranging
SOund Navigation And Range
SOund Navigational And Range
It is a technique that uses sound propagation to navigate.
(a)
Speed of sound in water is approximately 1500 m/sec
True
False
Measuring the depth to the ocean floor directly underneath the ship.
Single beam echo-sounder
Multi beam echo-sounder
Used to build up an image of a large area of the sea bed.
Single beam echo-sounder
Multi beam echo-sounder
Record depth on a specially treated paper held between 2 rollers moving at a uniform speed over a grounded plate.
Chart Recording Echo Sounder
Electronic Echo Sounder
It uses digital methods in measuring time delay of return pulses and a digital analogue display.
Chart Recording Echo Sounder
Electronic Echo Sounder
To generate the sound vibrations and also receive the reflected sound vibration.
Transducer
Pulse Generator
Amplifier
Recorder
To produce electrical oscillations for the transmitting transducer.
Transducer
Pulse Generator
Amplifier
Recorder
To amplify the weak electrical oscillations that has been generated by the receiving transducer on reception of the reflected sound vibration.
Transducer
Pulse Generator
Amplifier
Recorder
For measuring and indicating depth.
Transducer
Pulse Generator
Amplifier
Recorder
Presence of air bubbles below the transducer gives rise to false echoes.
Propagation Error
Pythagoras Error
False Bottom Echoes/Second Trace Echoes
Multiple Echoes
Aeration
This is caused in shallow waters with a rocky bottom due to some of the sound pulses reflecting up and down between the ship’s keel and the sea bottom before being recorded on the display.
Propagation Error
Pythagoras Error
False Bottom Echoes/Second Trace Echoes
Multiple Echoes
Aeration
In deep waters, by the time the sound pulse returns from the bottom, the stylus may have already finished more than one revolution.
Propagation Error
Pythagoras Error
False Bottom Echoes/Second Trace Echoes
Multiple Echoes
Aeration
If the vessel has one transducer for transmitting and one transducer for receiving, separated by some distance, the distance travelled by the pulse will be greater than the depth of the sea bed in shallow waters.
Propagation Error
Pythagoras Error
False Bottom Echoes/Second Trace Echoes
Multiple Echoes
Aeration
The Velocity Of Sound Increases When Temperature, Pressure & Salinity Increase.
Propagation Error
Pythagoras Error
False Bottom Echoes/Second Trace Echoes
Multiple Echoes
Aeration
In multiple echoes error, the first echo is the correct reading.
True
False
