Which vessel(s) is(are) required to comply with the "Vessel Bridge-to-Bridge Radiotelephone Regulations" while navigating?

Correct Answer: Option D — Dredges engaged in operations likely to restrict navigation of other vessels in or near a channel or fairway

Dredges engaged in operations that restrict navigation in channels or fairways are explicitly designated under the Vessel Bridge-to-Bridge Radiotelephone Act to maintain active radio watches for traffic coordination.