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COMDTINST M16500.25A — AIDS TO NAVIGATION MANUAL - STRUCTURES

COMDTINST M16500.25A is not in the current catalog Not in the current catalog
No current publication under this number appears in the USCG Directives catalog (our index refresh of 2026-08-23) — we find no successor to link. If it was replaced, the successor may use a different number or series: check the subject on USCG Directives or search this site. Do not cite this edition as current guidance.

Branch	U.S. Coast Guard
Series	COMDTINST M
Publication date	2005-11-07 (20.8 years ago)
Status	Not in the current catalog
Proponent / OPR	CG-432
Source of record	USCG Directives

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The official download link is broken

The official file for COMDTINST M16500.25A returns HTTP 404 when we checked on 2026-07-31. That is expected for a publication we record as not in the current catalog — portals remove the file once a publication leaves force. It is recorded here so the link does not simply fail in your hands.

Address on record: https://media.defense.gov/2022/Jul/27/2003043351/-1/-1/0/CIM_16500_25A.PDF. We check the link by requesting it, not by assuming it works.

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Nearby in the COMDTINST M series

COMDTINST M16500.2 — HYDROGRAPHIC MANUAL, 4TH ED (NOAA) Not in the current catalog
COMDTINST M16500.21A — AIDS TO NAVIGATION MANUAL - SEAMANSHIP Current
COMDTINST M16500.24 — SOLAR DESIGN MANUAL Not in the current catalog
COMDTINST M16500.3A — AIDS TO NAVIGATION MANUAL – TECHNICAL Not in the current catalog
COMDTINST M16500.4B — RANGE DESIGN MANUAL Not in the current catalog

This is an unofficial index built from the public catalog. The controlling copy is always the one on USCG Directives — verify there before citing COMDTINST M16500.25A in an official product.