46 CFR § 15.816
Automatic radar plotting aids (ARPAs)
April 15, 2021
Every person in the required complement of deck officers, including the master, on seagoing vessels equipped with automatic radar plotting aids (ARPAs), except those vessels listed in §15.105(f) and (g) of this part, must hold an appropriate STCW endorsement valid for vessels equipped with ARPA.
[USCG-2004-17914, 78 FR 78007, Dec. 24, 2013]