USCG Exam Practice · Radar fundamentals and ARPA basics
Under 33 CFR §164.38, what ARPA display orientation modes must be available as a minimum requirement?
- ATrue motion only, with north-up stabilization
- BRelative motion with north-up and either head-up or course-up azimuth stabilization✓ correct
- CHead-up only, with relative motion display
- DCourse-up only, with true motion display
Why B is correct
Appendix A to 33 CFR §164.38, paragraph 3.4.6, requires the ARPA to be capable of operating with a relative motion display with north-up and either head-up or course-up azimuth stabilization. True motion is optional; if provided, the operator must be able to select either true or relative motion.
Cited:33 CFR §164.38
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