USCG Exam PracticeRadar fundamentals and ARPA basics
The IMO Performance Standards in 33 CFR §164.38 Appendix A define 'azimuth stabilization' in the context of an ARPA display. Which statement correctly describes this term?
- A. The display orientation is fixed with own ship's heading at the top, and the picture rotates as the vessel turns.
- ✓ Own ship's compass information is fed to the display so that target echoes will not smear due to changes in own ship's heading.Correct
- C. The display is stabilized relative to the sea bottom so that current and leeway are automatically corrected.
- D. An intended course is set to the line connecting the center with the top of the display, and the picture is fixed to that course.
Why B is correct
Annex 1 to Appendix A of 33 CFR §164.38 defines azimuth stabilization as: own ship's compass information is fed to the display so that echoes of targets on the display will not be caused to smear by changes of own ship's heading. Option D describes 'course-up' orientation, which is a separate defined term in the same annex.
Cited:33 CFR §164.38