46 C.F.R. § 98.30-33 Warning signals.
Title 46 - Shipping
(a) If the vessel is moored, no person may transfer to or from a portable tank a product with a flashpoint of less than 300° F unless the person in charge displays a— (1) Red flag by day; and (2) Red electric lantern by night. (b) If the vessel is at anchor, no person may transfer to or from a portable tank a product with a flashpoint of less than 300° F unless the person in charge displays a red flag. (c) The signal required in paragraphs (a) and (b) of this section must be visible on all sides of the vessel.
Title 46: Shipping
PART 98—SPECIAL CONSTRUCTION, ARRANGEMENT, AND OTHER PROVISIONS FOR CERTAIN DANGEROUS CARGOES IN BULK
Subpart 98.30—Portable Tanks
§ 98.30-33 Warning signals.
