COMPETENCE 3 – Use of Radar and ARPA for the Safety of Navigation
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#1. Raster-scan chart data is:
Incorrect!
#2. In a charted water with a depth of 35 meters, a 380-meter long vessel dropped her anchor during a normal weather condition. If you want to achieve a reading in the Variable Range Marker (VRM) of 0.355 n. miles on the ARPA, representing the maximum swing of the ship. What scope of the anchor should you use?
Incorrect!
#3. The 10-cm radar as compared to a 3-cm radar of similar specifications will:
Incorrect!
#4. Your ARPA has two guard zones. What is the purpose of the inner guard zone?
Incorrect!
#5. Electronic Plotting Aid (EPA) has which built in functions?
Incorrect!
#6. In general, on how many radio channels will an automatic identification system (AIS) operate?
Incorrect!
#7. As an ARPA user, what is your indication on the display of a linear extrapolation into the future of a target's motion, based on measurements of the target's range and bearing on the radar in the recent past?
Incorrect!
#8. The description "Racon" beside an illustration on a chart would mean a:
Incorrect!
#9. Your ARPA had two guard zones. What is the purpose of the inner guard zone?
Incorrect!
#10. An automatic identification system (AIS) transponder transmits and receives information broadcasts on:
Incorrect!
#11. With regards to ARPA, what the IMO minimum continuously tracking requirements?
Incorrect!
#12. How many targets can an Electronic Plotting Aid (EPA) track at the same time?
Incorrect!
#13. Comparing manual and automatic acquisition in ARPA, which is most sensitive?
Incorrect!
#14. Your ARPA has automatic speed inputs from the log. Due to currents, the log is indicating a faster speed than the speed over the grounds. What should you expect under these circumstances?
Incorrect!
#15. The ARPA may swap targets when automatically tracking if two targets:
Incorrect!
There are 15 questions for the actual examination for Competence 3 for OIC-NW with a passing rate of 70%. This means that you are only allowed to make 4 mistakes.
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