46 C.F.R. § 108.717 Radar.
Title 46 - Shipping
Each self-propelled unit of 1,600 gross tons and over in ocean or coastwise service must have— (a) A marine radar system for surface navigation; and (b) Facilities on the bridge for plotting radar readings.
Title 46: Shipping
PART 108—DESIGN AND EQUIPMENT
Subpart H—Miscellaneous Equipment
§ 108.717 Radar.