33 CFR § 173.81 - Coast Guard forms for numbering and casualty reporting.

---
identifier: "/us/cfr/t33/s173.81"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "33 CFR § 173.81 - Coast Guard forms for numbering and casualty reporting."
title_number: 33
title_name: "Navigation and Navigable Waters"
section_number: "173.81"
section_name: "Coast Guard forms for numbering and casualty reporting."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "S"
subchapter_name: "BOATING SAFETY"
part_number: "173"
part_name: "VESSEL NUMBERING AND CASUALTY AND ACCIDENT REPORTING"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "31 U.S.C. 9701; 46 U.S.C. 2110, 6101, 12301, 12302; OMB Circular A-25; DHS Delegation No. 00170.1, Revision No. 01.4."
regulatory_source: "CGD 72-54R, 37 FR 21399, Oct. 7, 1972, unless otherwise noted."
cfr_part: "173"
---


# 173.81 Coast Guard forms for numbering and casualty reporting.

(a) In a State where the Coast Guard is the issuing authority, the following Coast Guard forms must be used:

(1) Each application for a certificate of number or renewal must be made on two-part Form CG-3876 and 3876A, Application for Number and Temporary Certificate.

(2) Each notification required by § 173.29(b) must be made on Form CG-2921, Notification of Change in Status of Vessel.

(3) Each notification required by § 173.29(a) must be made on Form CG-3920, Change of Address Notice.

(4) Each notification required by § 173.29(c) must be made in writing.

(5) Each application for a duplicate certificate of number must be made on two-part Form CG-3919 and CG-3919A, Application for Duplicate Certificate of Number and Temporary Duplicate Certificate.

(6) Each vessel casualty required to be reported by § 173.55 must be made on Form CG-3865.

(b) Each surrender of a certificate of number required by § 173.31 may be made in any form but must contain a written statement as to why the certificate is being surrendered.