46 CFR § 184.404 - Radars.

---
identifier: "/us/cfr/t46/s184.404"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 184.404 - Radars."
title_number: 46
title_name: "Shipping"
section_number: "184.404"
section_name: "Radars."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "T"
subchapter_name: "SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS)"
part_number: "184"
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. 2103, 3306; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; DHS Delegation 00170.1, Revision No. 01.2."
regulatory_source: "CGD 85-080, 61 FR 1002, Jan. 10, 1996, unless otherwise noted."
cfr_part: "184"
---


# 184.404 Radars.

(a) A vessel must be fitted with a Federal Communications Commission (FCC) type accepted general marine radar system for surface navigation with a radar screen mounted at the primary operating station if:

(1) The vessel is self-propelled;

(2) The vessel has an oceans, coastwise, limited coastwise, or Great Lakes route; and

(3) The vessel carries more than 49 passengers.

(b) A ferry that carries more than 49 passengers on a rivers route not within one mile of land must be fitted with a FCC Type Accepted general marine radar system for surface navigation with a radar screen mounted at the primary operating station.

(c) The radar and its installation must be suitable for the intended speed and route of the vessel.

(d) A vessel operated on a short restricted route need not be fitted with a radar if the cognizant OCMI determines that a radar is not necessary due to the vessel's route and local weather conditions.