BOTH INTERNATIONAL & INLAND Which display indicates a vessel conducting mine clearance operations?

Correct Answer: Option D — One ball near the foremast head and one ball at each end of the fore yard

Annex II of the COLREGS and 33 CFR 83.27 specify that a vessel engaged in mine clearance operations must display three balls in a triangle at the masthead and one ball at each end of the fore yard. This signal warns other vessels of the extreme danger posed by mines.