46 CFR § 98.30-33 - Warning signals.

---
identifier: "/us/cfr/t46/s98.30-33"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 98.30-33 - Warning signals."
title_number: 46
title_name: "Shipping"
section_number: "98.30-33"
section_name: "Warning signals."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "I"
subchapter_name: "CARGO AND MISCELLANEOUS VESSELS"
part_number: "98"
part_name: "SPECIAL CONSTRUCTION, ARRANGEMENT, AND OTHER PROVISIONS FOR CERTAIN DANGEROUS CARGOES IN BULK"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1903; 46 U.S.C. 3306, 3307, 3703; 49 U.S.C. App. 1804; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; Department of Homeland Security Delegation No. 0170.1."
regulatory_source: "CGFR 65-50, 30 FR 17022, Dec. 30, 1965, unless otherwise noted."
cfr_part: "98"
---


# 98.30-33 Warning signals.

(a) If the vessel is moored, no person may transfer to or from a portable tank or IBC 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 or IBC 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.

[CGD 73-172, 39 FR 22954, June 25, 1974, as amended by USCG-2011-0088, 78 FR 54787, Sept. 6, 2013]