ARPA Exam Questions with Detailed Verified Answers

Page | 1


ARPA Exam Questions with Detailed Verified
Answers

Question: What does ARPA stand for?

Ans✅ ✅: Automatic Radar Plotting Aid

Question: Which of the following best describes the function of ARPA?

Ans✅ ✅: Automating Radar target acquisition, tracking and plotting

Question: What is one of the primary purposes of ARPA according to
IMO Performance Standards?

Ans✅ ✅: Reducing workload by providing automatic target information

Question: In what way does ARPA contribute to navigational safety?

Ans✅ ✅: By facilitating collision avoidance through automatic tracking and plotting

Question: What distinguishes ARPA from manual radar plotting?

Ans✅ ✅: ARPA enables simultaneous tracking of multiple targets automatically.

Question: According to the IMO, what was the primary reason for
developing ARPA?

Ans✅ ✅: Tor reduce the workload of RADAR observers and enhance collision
avoidance.

Question: How does ARPA benefit larger vessels compared to traditional
radar plotting methods?

Ans✅ ✅: By enabling simultaneous tracking of multiple targets with minimal effort.

Question: Which type of vessels are commonly equipped with Electronic
Plotting Aids (EPA) instead of ARPA?

, Page | 2
Ans✅ ✅: Fishing Boats

Question: What is the main difference between ARPA and EPA?

Ans✅ ✅: EPA requires manual input for target plotting while ARPA is automatic.

Question: How does ARPA improve collision avoidance capabilities?

Ans✅ ✅: by predicting future positions of nearby vessels

Question: Which organization sets the standards for ARPA functionality?

Ans✅ ✅: IMO

Question: What is the role of ARPA in relation to the radar observer's
workload?

Ans✅ ✅: ARPA reduces workload by providing automatic target information

Question: How does ARPA contribute to situational awareness?

Ans✅ ✅: By identifying potential hazards in the ship vicinity

Question: Which feature of ARPA makes it particularly useful in areas of
high traffic density?

Ans✅ ✅: capacity to simultaneously track multiple targets.

Question: What is the main advantage of ARPA over traditional radar
plotting methods?

Ans✅ ✅: ARPA can track multiple targets automatically.

Question: Which display type does not suffer from image distortion near
the edges of the screen?

Ans✅ ✅: LCD Flat Panel

Question: What information can modern displays present alongside
radar presentations?

, Page | 3
Ans✅ ✅: Target data

Question: What was the limitation of the early standalone ARPA units in
terms of data processing?

Ans✅ ✅: Could only process range and bearing.

Question: What development led to the introduction of automatic radar
tracking on large commercial vessels?

Ans✅ ✅: Digital Microprocessors

Question: What is the purpose of a Doppler speed log in ARPA systems?

Ans✅ ✅: To measure own ship speed

Question: What is the primary advantage of using a trackball, mouse
pad, or joystick to access radar andARPA functions?

Ans✅ ✅: Simplification of user interface

Question: What system is used to define the location of a contact in
terms of range and bearing?

Ans✅ ✅: Polar coordinate system

Question: Which display type is mandated for all ARPAs by the IMO?

Ans✅ ✅: Flat Panel LCD

Question: How does ARPA determine if a radar contact contains a
possible target?

Ans✅ ✅: By analyzing the signal strength and persistence within each cell.

Question: According to the IMO, how many targets must an ARPA
equipped only with manual acquisition be capable of tracking
simultaneously?

Ans✅ ✅: 10 targets