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OPNAVINST 3721.20E — DEPARTMENT OF DEFENSE NOTICE TO AIRMEN (NOTAM) SYSTEM

OPNAVINST 3721.20E is listed as current Current
in the DON Issuances (DONI) catalog as of our last index refresh (2026-08-23). Status is mirrored from that catalog, re-checked weekly — every change is logged. Note: its publication date is 2018-03-27 — 8.4 years old — so check for newer interim changes before citing it.

Branch	U.S. Navy
Series	OPNAVINST
Publication date	2018-03-27 (8.4 years ago)
Status	Current
Proponent / OPR	N885
Source of record	DON Issuances (DONI)

Download PDF Official document (DON Issuances (DONI))

What changed in this edition

This document has been updated to reflect the replacement of Defense Internet Notice to Airmen Service with Notice to Airmen Manager and Defense Aeronautical Information Portal. It has been significantly re-organized in chapter and content layout from the previous version and should be thoroughly reviewed in its entirety
— Summary of Changes, OPNAVINST 3721.20E, quoted from the official PDF

Publications state their own changes on page 1 — behind a PDF the official host will not serve to a search engine. This is that section, verbatim. It describes the edition above, not every historical change.

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Get an email if OPNAVINST 3721.20E is revised, superseded, or rescinded.

Nearby in the OPNAVINST series

OPNAVINST 3600.4 — POLICY FOR THE MATERIAL AND TACTICAL CERTIFICATION OF CONVENTIONAL PROMPT STRIKE MISSILE CAPABLE SURFACE SHIPS Current
OPNAVINST 3710.37B — ANTHROPOMETRIC ACCOMMODATIONS IN NAVAL AIRCRAFT Current
OPNAVINST 3710.7V — NAVAL AIR TRAINING AND OPERATING PROCEDURES STANDARDIZATION PROGRAM Current
OPNAVINST 3721.5M — NAVAL AIR TRAFFIC CONTROL AIR NAVIGATION AIDS AND LANDING SYSTEMS PROGRAM Current
OPNAVINST 3722.33E — FEDERAL AVIATION ADMINISTRATION ORDER JO 7610.4 SPECIAL OPERATIONS Current

This is an unofficial index built from the public catalog. The controlling copy is always the one on DON Issuances (DONI) — verify there before citing OPNAVINST 3721.20E in an official product.