46 CFR § 77.09-1 - When required.

---
identifier: "/us/cfr/t46/s77.09-1"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 77.09-1 - When required."
title_number: 46
title_name: "Shipping"
section_number: "77.09-1"
section_name: "When required."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "H"
subchapter_name: "PASSENGER VESSELS"
part_number: "77"
part_name: "VESSEL CONTROL AND MISCELLANEOUS SYSTEMS AND EQUIPMENT"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 3306; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; DHS Delegation No. 00170.1, Revision No. 01.4."
regulatory_source: "CGFR 65-50, 30 FR 16953, Dec. 30, 1965, unless otherwise noted."
cfr_part: "77"
---


# 77.09-1 When required.

All mechanically propelled vessels of 1,600 gross tons and over in ocean or coastwise service must be fitted with a marine radar system for surface navigation. Facilities for plotting radar readings must be provided on the bridge.

[CGD 75-074, 42 FR 5963, Jan. 31, 1977]