33 CFR § 62.31 - Special marks.

---
identifier: "/us/cfr/t33/s62.31"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "33 CFR § 62.31 - Special marks."
title_number: 33
title_name: "Navigation and Navigable Waters"
section_number: "62.31"
section_name: "Special marks."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "C"
subchapter_name: "AIDS TO NAVIGATION"
part_number: "62"
part_name: "UNITED STATES AIDS TO NAVIGATION SYSTEM"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "14 U.S.C. 544; 43 U.S.C. 1333; 46 U.S.C. 70031, 70041; DHS Delegation 00170.1, Revision No. 01.4."
regulatory_source: "CGD 86-031, 52 FR 42640, Nov. 6, 1987, unless otherwise noted."
cfr_part: "62"
---


# 62.31 Special marks.

Special marks are not primarily intended to assist safe navigation, but to indicate special areas or features referred to in charts or other nautical publications. They may be used, for example, to mark anchorages, cable or pipeline areas, traffic separation schemes, military exercise zones, ocean data acquisition systems, etc. Special marks are colored solid yellow.