ARPA TEST FOR WAKANDA UPDATED
Exam Questions and CORRECT Answers
ARPA - CORRECT ANSWER- Automatic Radar Plotting Aid
According to IMO Standard Arpa should do what two things? - CORRECT ANSWER- 1. reduce
the work load of workers by enabling them to automatically obtain information
2.provide continuous, accurate and rapid situation evaluation.
4 things ARPA must provide? - CORRECT ANSWER- 1. Range and bearing of target
2. Course and speed of target
3. Predicted cpa
4. Predicted tcpa
2 ways of acquiring a target? - CORRECT ANSWER- manual and automatic
How long is the suppression of a vector? - CORRECT ANSWER- 1 minute; time is needed for
ARPA to build confidence
Time it takes to provide tracking info? - CORRECT ANSWER- 2 to 3 minutes
Guard Zones are use to... - CORRECT ANSWER- automatically track targets
If a object enters the guard zone the alarm will be... - CORRECT ANSWER- both audio and
visual
Problems that can occur with auto-acquire - CORRECT ANSWER- - Over acquires targets
- Can acquire sea clutter and spurious targets
- If gain/sensitivity is too low then may not acquire targets
ARPA should be more accurate than... - CORRECT ANSWER- Manual Plotting
Vector definition - CORRECT ANSWER- computer generated lines that originate at a target
and/or lines that have magnitude and direction
At first, gate is relatively... - CORRECT ANSWER- Large but gets smaller over time
Reasons a smaller gate is better - CORRECT ANSWER- - more accurate, improves tracking in
rain and sea clutter
Gate also reduces the chance of - CORRECT ANSWER- target swap
All vectors are dependent on? - CORRECT ANSWER- Steady State tracking
Exam Questions and CORRECT Answers
ARPA - CORRECT ANSWER- Automatic Radar Plotting Aid
According to IMO Standard Arpa should do what two things? - CORRECT ANSWER- 1. reduce
the work load of workers by enabling them to automatically obtain information
2.provide continuous, accurate and rapid situation evaluation.
4 things ARPA must provide? - CORRECT ANSWER- 1. Range and bearing of target
2. Course and speed of target
3. Predicted cpa
4. Predicted tcpa
2 ways of acquiring a target? - CORRECT ANSWER- manual and automatic
How long is the suppression of a vector? - CORRECT ANSWER- 1 minute; time is needed for
ARPA to build confidence
Time it takes to provide tracking info? - CORRECT ANSWER- 2 to 3 minutes
Guard Zones are use to... - CORRECT ANSWER- automatically track targets
If a object enters the guard zone the alarm will be... - CORRECT ANSWER- both audio and
visual
Problems that can occur with auto-acquire - CORRECT ANSWER- - Over acquires targets
- Can acquire sea clutter and spurious targets
- If gain/sensitivity is too low then may not acquire targets
ARPA should be more accurate than... - CORRECT ANSWER- Manual Plotting
Vector definition - CORRECT ANSWER- computer generated lines that originate at a target
and/or lines that have magnitude and direction
At first, gate is relatively... - CORRECT ANSWER- Large but gets smaller over time
Reasons a smaller gate is better - CORRECT ANSWER- - more accurate, improves tracking in
rain and sea clutter
Gate also reduces the chance of - CORRECT ANSWER- target swap
All vectors are dependent on? - CORRECT ANSWER- Steady State tracking
