46 CFR § 196.20-1 - Unnecessary whistling prohibited.

---
identifier: "/us/cfr/t46/s196.20-1"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 196.20-1 - Unnecessary whistling prohibited."
title_number: 46
title_name: "Shipping"
section_number: "196.20-1"
section_name: "Unnecessary whistling prohibited."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "U"
subchapter_name: "OCEANOGRAPHIC RESEARCH VESSELS"
part_number: "196"
part_name: "OPERATIONS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1321(j); 46 U.S.C. 2213, 3306, 5115, 6101; E.O. 12777, 56 FR 54757, 3 CFR, 1991 Comp., p. 351; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; Department of Homeland Security Delegation No. 0170.1."
regulatory_source: "CGFR 67-83, 33 FR 1158, Jan. 27, 1968, unless otherwise noted."
cfr_part: "196"
---


# 196.20-1 Unnecessary whistling prohibited.

(a) The unnecessary sounding of the vessel's whistle is prohibited within any harbor limits of the United States.