Nav5 (==3
Mastering Radar and ARPA Knowledge Quiz
Test your knowledge of RADAR and ARPA systems with our comprehensive quiz! This quiz consists of 64 questions and is designed to challenge your understanding of maritime navigation technology.
Topics include:
- RADAR Fun
ctionality - ARPA Modes and Features
- COLREGS Regulations
- Collision Avoidance Techniques
1. How does inclement weather effect RADAR/ARPA ?
Maximum range of contact is reduced
Minimum range of contact is reduced
Maximum range of contact is increase
Maximum range of contact is remain
2. Using the control STC on RADAR, at what distance does sea return disappear?
6 - 10 miles
6 - 8 miles
4-8 miles
4-10 miles
3. In ARPA acquisition, targets NOT detected in 5 consecutive scans become ________?
Selected targets
Acquire target
New target
Lost targets
4. Which structures would NOT caused blind and shadow sectors to radar?
Skylight
Bad Echo
Aquisition
Cross-track error
5. Which of the following is NOT stabilized?
True motion display
ETA of the vessel
Ship's head-up, Relative motion
Relative track information
6. Which ARPA display mode shows without azimuth stabilization in which the line connecting the center with the top of the display indicates own ship’s heading?
North-up mode
Course-up mode
Relative mode
Head-up Mode
7. The position of own ship on such a display moves in accordance with it’s own motion is called_____.
True motion display
ETA of the vessel
Ship's head-up, Relative motion
Relative track information
8. After switching power on radar, you will have to wait until the set warms up for _______seconds.
60
120
180
200
9. Which of the following would NOT be considered an input to the computer of a collision avoidance system ?
Aquisition
Cross-track error
Own ship’s wind velocity from an anemometer
Cross-track error
10. Which factor is NOT considered in establishing a safe CPA?
True motion display
ETA of the vessel
Ship's head-up, Relative motion
Relative track information
11. The length of a vector depends on the ___________
Own ship’s wind velocity from an anemometer
ETA of the vessel
Relative track information
Time that the operator enters
12. Which name is associated with a tracked target which appears to have been temporarily lost or which has a poorly defined radar aspect, in so much that, the target does NOT have tracking ability?
Bad Echo
Lost target
Aquisition
Sidelobes
13. A symbol that shows on the PPI scope a flashing triangle apex down, used to mark the target.
Relative track information
When making way, sound one prolonged blast at intervals of not more than one-minute
The closest point a ship or target will approach your own ship
Target entering guard ring
14. A symbol that shows a flashing diamond formed from two equal triangle, one apex up the other apex down.
Warning
CPA/TCPA warning
Lost target warning
Relative track information
15. A symbol that shows a flashing triangle apex up, used to mark the target.
Warning
CPA/TCPA warning
Lost target warning
Relative track information
16. Which of the following ARPA data should you use in order to determine if a close quarter situation will develop with a target vessel?
Warning
CPA/TCPA warning
Lost target warning
Relative track information
17. When using an ARPA, which of the following should you consider in order to evaluate the information displayed?
Can use radar information from one object to fix the position
Aquisition
Navigational constraints may require a target vessel to change course
When making way, sound one prolonged blast at intervals of not more than one-minute
18. A navigator fixing a vessel’s position by radar ______.
can use radar information from one object to fix the position
Aquisition
Navigational constraints may require a target vessel to change course
When making way, sound one prolonged blast at intervals of not more than one-minute
19. Which term refers to the selection of targets that requires tracking procedure and the initiation of their tracking?
can use radar information from one object to fix the position
Aquisition
Navigational constraints may require a target vessel to change course
When making way, sound one prolonged blast at intervals of not more than one-minute
20. From the following remarks on Rule 8 of COLREGS 72 are mentioned correct EXCEPT:
Taking all way off
Parallel indexing
Cross-track error
Radar reflector
21. When navigating in restricted visibility a power driven vessel shall _______.
can use radar information from one object to fix the position
Aquisition
Navigational constraints may require a target vessel to change course
When making way, sound one prolonged blast at intervals of not more than one-minute
22. As per COLREGS, in radar maneuvering it is better to make a 30 degrees course change in ______.
2 alteration of 30 degrees
2 alteration of 60 degrees
1 alteration of 30 degrees
1 alteration of 60 degrees
23. Which rule obligates the mariner to determine if a closed quarter’s situation is developing and/or risk of collision exists by radar plotting?
Rule 21
Rule 25
Rule 19
Rule 12
24. A technique used as a measure to monitor the progress of a vessel on the track and to minimize the cross track distance.
Taking all way off
Parallel indexing
Cross-track error
Radar reflector
25. The distance the vessel is to one side of the straight line between two waypoints.
Taking all way off
Parallel indexing
Cross-track error
Radar reflector
26. All ships of less than 100 tons gross tonnage operating in international waters and adjacent coastal areas should, if practicable, be fitted with ____.
Taking all way off
Parallel indexing
Cross-track error
Radar reflector
27. If you input gyro course to the ARPA, what can you expect?
No problem
There is a problem
Good
Bad
28. The ARPA term CPA refers to _____.
Multiple echoes
Navigate as though the effective range of the radar has been reduced
Sidelobes
The closest point a ship or target will approach your own ship
29. Which radar error occurs when a radar beam bounces back and forth between the ship and a relatively close-in target, I.e. Another ship?
Multiple echoes
Navigate as though the effective range of the radar has been reduced
Sidelobes
The closest point a ship or target will approach your own ship
30. When using the ARPA in heavy rain, which action should you take?
Multiple echoes
Navigate as though the effective range of the radar has been reduced
Sidelobes
The closest point a ship or target will approach your own ship
31. Every time the radar pulse is transmitted, some radiation escapes on each side of the beam, called _____.
Multiple echoes
Navigate as though the effective range of the radar has been reduced
Sidelobes
The closest point a ship or target will approach your own ship
32. How can rescue personnel detect that a SART is transmitting in the vicinity?
The DSC unit will react to the SART's signal and respond with the two-tone alarm.
The SART's blips on the PPI will become arcs and eventually become concentric circles
The SART signal appears as a target which comes and goes; the effect of heavy swells on a SART.
The SART can provide an approximate location to within a two nautical mile radius, per IMO standards.
33. Which name is associated with a target that is no longer being tracked having become lost or obscured?
Lost Target
Selected targets
New target
Acquire target
34. What is the meaning of flashing diamond in ARPA?
Lost Target
Selected targets
New target
Acquire target
35. Any object fixed or moving whose position and motion is determined by measurements of range and bearing on radar is called ____.
CPA
TCPA
Target
RML
36. When using an ARPA, what should you consider in order to evaluate the information displayed?
Navigate as though the effective range of the radar has been reduced
Navigational constraints may require a target vessel to change course
Maximum range of contact is reduced
Navigational constraints may require a target vessel to change course
37. Use of radar under “Section I – Conduct of vessels in any condition of visibility” is required of _____.
Rule 10
Rule 7
Rule 9
Rule 5
38. What is the word 'lost target' means in ARPA?
A tracked target entering your preset CPA-TCPA limit
Target can no longer plotted
Selected target
Speed of the vessel over the ground or through the water
39. What will cause the ARPA to emit a visual alarm, audible alarm, or both?
A tracked target entering your preset CPA-TCPA limit
Target can no longer plotted
Selected target
Speed of the vessel over the ground or through the water
40. ARPA is based on __________.
Anti-collision radar
Collision avoidance
+/- 10° of roll
Device that extracts and presents such data
41. The display on which ARPA information is presented should have an effective diameter of at least ____.
350 mm
340 mm
360 mm
380 mm
42. It shows a square indicated by its corners centered around the target symbol.
A tracked target entering your preset CPA-TCPA limit
Target can no longer plotted
Selected target
Speed of the vessel over the ground or through the water
43. Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the ______.
A tracked target entering your preset CPA-TCPA limit
Target can no longer plotted
Selected target
Speed of the vessel over the ground or through the water
44. When will ARPA provide true data?
After about two minutes of tracking
After about five minutes of tracking
After about ten minutes of tracking
After about one minutes of tracking
45. What is the purpose or function of the “Trial Mode” used in most ARPA equipment?
Take avoiding action as soon as possible
The ARPA will generate data as if the target was still being tracked by radar.
It is used to allow results of proposed maneuver to be assessed
The targets true course vector will be in error
46. Your ARPA has automatic speed inputs from the log. Due to currents, the log is indicating a faster speed than the speed over the ground. What should you expect under these circumstances?
Take avoiding action as soon as possible
The ARPA will generate data as if the target was still being tracked by radar.
It is used to allow results of proposed maneuver to be assessed
The targets true course vector will be in error
47. In fog, you observe your radar and determine that the risk of collision exists with a vessel that is 2 miles off your port bow. You should ___________.
Take avoiding action as soon as possible
The ARPA will generate data as if the target was still being tracked by radar.
It is used to allow results of proposed maneuver to be assessed
The targets true course vector will be in error
48. You have been tracking a target and have generated the target course and speed. The radar did not receive a target echo on its last two scans due to the weather. What should you expect under these circumstances?
Take avoiding action as soon as possible
The ARPA will generate data as if the target was still being tracked by radar.
It is used to allow results of proposed maneuver to be assessed
The targets true course vector will be in error
49. What will cause the ARPA to emit a visual alarm, audible alarm, or both?
When no evidence of the target is found after five successive sweeps of the antenna
Poor sensitivity
A tracked target entering your preset CPA-TCPA limit.
Warn of small targets that are initially detected closer than the outer guard zone
50. In ARPA, in what case you have lost target?
When no evidence of the target is found after five successive sweeps of the antenna
Poor sensitivity
A tracked target entering your preset CPA-TCPA limit.
Warn of small targets that are initially detected closer than the outer guard zone
51. Your ARPA had two guard zones, what is the purpose of the inner guard zone?
When no evidence of the target is found after five successive sweeps of the antenna
Poor sensitivity
A tracked target entering your preset CPA-TCPA limit.
Warn of small targets that are initially detected closer than the outer guard zone
52. When will ARPA emit an alarm to denote that a target is lost?
When no evidence of the target is found after five successive sweeps of the antenna
Poor sensitivity
A tracked target entering your preset CPA-TCPA limit.
Warn of small targets that are initially detected closer than the outer guard zone
53. The recognition of the presence of a target is called _____.
Detection
Automatic acquisition
After the contact has been marked at least twice
Pass close together
54. The closest point of approach of a contact on a relative motion radar may be determined:
Detection
Automatic acquisition
After the contact has been marked at least twice
Pass close together
55. Comparing manual and automatic acquisition in ARPA, which is most sensitive?
Detection
Automatic acquisition
After the contact has been marked at least twice
Pass close together
56. How would the two targets if the ARPA may swap targets when automatically tracking? When would target swap happens when you are tracking 2 targets automatically?
Detection
Automatic acquisition
After the contact has been marked at least twice
Pass close together
57. You are using a radar in which your ownship is shown at the center, and the heading flash always points to zero. If bearings are measured in relation to the flash. What type of bearings are produced?
Relative bearing
On the same course and speed as your vessel
Preserving course, maintaining speed
Target course and bearing of own ship from target
58. A radar contact will remain stationary on a relative motion radar display only when it is _________.
Relative bearing
On the same course and speed as your vessel
Preserving course, maintaining speed
Target course and bearing of own ship from target
59. These are methods of Collision Avoidance, EXCEPT ______.
Relative bearing
On the same course and speed as your vessel
Preserving course, maintaining speed
Target course and bearing of own ship from target
60. Target aspect are measured from _________.
Relative bearing
On the same course and speed as your vessel
Preserving course, maintaining speed
Target course and bearing of own ship from target
61. A radar range to a small, charted object such as light will provide a line of position in which form?
Radar range and visual bearing
Arc
Relative bearing
Tracking
62. The most accurate position by radar fix is ________.
Radar range and visual bearing
Arc
Relative bearing
Tracking
63. What is the process of observing the sequential changes in the position of target, to establish its motion?
Radar range and visual bearing
Arc
Relative bearing
Tracking
64. Does the COLREGS give any preference to ships equipped with ARPA?
Yes
No
Maybe
Sige
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