Comparing manual and automatic acquisition, which is most sensitive?
Ваш ответ правильный:
Manual acquisition.
2
Does current and drift affect the CPA/TCPA calculations on a true motion, true vector presentation?
Ваш ответ правильный:
No.
3
Does incorrect speed input affect the true vectors on a ARPA display?
Ваш ответ правильный:
Yes.
4
How can the true course and speed of a target be found when the display is showing relative vectors?
Ваш ответ правильный:
By looking at the digital readout of target information.
5
How can true vectors be easily identified as the vectors on display?
Ваш ответ правильный:
Own ship has a vector.
6
If the input gyro course is in error and fed to the ARPA, what can be expected?
Ваш ответ правильный:
Errors in other ships calculated course and speeds.
7
Ship A is navigating in an area of restricted visibility and has detected, by radar alone, a crossing ship B, on her port bow. Which ship is the “Stand-On” vessel?
Ваш ответ правильный:
None.
8
The plotting process can be divided into four separate operations. Which?
Ваш ответ правильный:
Detection – Selection – Tracking – Plotting.
9
To which condition of visibility does Rule no. 5 Lookout apply?
Ваш ответ правильный:
Any condition of visibility.
10
What do the sides in the relative plotting triangle represent?
Ваш ответ правильный:
Targets true course and speed – Own ship true course and speed – Targets relative course and speed.
11
What does manual acquisition mean?
Ваш ответ правильный:
The operator must select and acquire each target separately.
12
What does the lost target alarm tell you?
Ваш ответ правильный:
A previously tracked target is no longer tracked.
13
What does the target ship’s aspect mean?
Правильный ответ:
The relative bearing of own ship measured at the target ship.
Ваш ответ:
The relative bearing of the target ship measured at own ship.
14
What influence does an error in speed and/or gyro input have on the calculated CPA and TCPA?
Ваш ответ правильный:
None.
15
What information is immediately apparent from the “relative plot” of another vessel?
Ваш ответ правильный:
CPA.
16
What information is immediately apparent from the “true plot” of another vessel?
Ваш ответ правильный:
Targets true course and speed.
17
What is the correct speed input to an ARPA, used for traffic surveillance?
Ваш ответ правильный:
Speed through water.
18
What is the meaning of this symbol?
Ваш ответ правильный:
Lost target.
19
What is the purpose of a Guard ring on an ARPA?
Ваш ответ правильный:
It provides automatic target acquisition.
20
What is the purpose of digitising the radar echoes?
Ваш ответ правильный:
The ARPA tracking system only work with digital signals.
21
What is the result if there is no heading input to the radar?
Ваш ответ правильный:
An un-stabilised Head-Up presentation will be the only one available.
22
What is the result of “Target Swop”?
Правильный ответ:
A previously tracked target is no longer tracked.
Ваш ответ:
A target will no longer be visible on the screen.
23
Which ARPA presentation provides the information “closest to what you see through the bridge windows”?
Ваш ответ правильный:
True Motion, Course Up, True Vector.
24
Which sensor input is required for the ARPA to be able to calculate and display true vectors?
Ваш ответ правильный:
Course and speed.
25
Why at different times is there a change in the size of the tracking gate?
Ваш ответ правильный:
There has been a change in course or speed.
26
You have radars installed on your ship, are you required to use them?