Nav aids

Mf, hf and dsc services off air 021200Z to 021600Z oct at uscg remote communication facilities: a. boston…

North Atlantic Ocean · NAVAREA IV 954/26

What this record establishes

Cancelled notice · 2026-10-01 16:15Z

This notice disappeared from the issuing source's in-force list. No explicit recovery or all-clear is established by that removal.

Source and dates: NGA MSI in-force warnings (DailyMem*.txt). Issued 2026-10-01 09:00Z. First collected 2026-10-01 19:02Z; last seen in collection 2026-10-01 19:32Z. Collection dates record ingestion, not a new incident or a fresh field observation.
Location covered: North Atlantic Ocean. The parsed report position is 30.873, -77.149. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Current notices and reporting history in the North Atlantic Ocean →

Activity windows · 1 in this warning

opens (UTC)	closes (UTC)	local	length
2026-10-02 12:00Z	2026-10-02 16:00Z	—	4 h

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

issued: 2026-10-01 09:00Z
status: Cancelled notice
self-cancels: 2026-10-02 17:00Z
NAVAREA: NAVAREA IV
sea: North Atlantic Ocean
position: 30.873, -77.149
source: NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-10-01 19:02Z

Original warning text

WESTERN NORTH ATLANTIC.
1. MF, HF AND DSC SERVICES OFF AIR
   021200Z TO 021600Z OCT AT USCG
   REMOTE COMMUNICATION FACILITIES:
   A. BOSTON 41-42.80N 070-30.30W.
   B. CHESAPEAKE 36-43.70N 076-00.60W.
   C. CHARLESTON 32-50.70N 079-57.00W.
   D. MIAMI 25-37.00N 080-23.00W.
   E. NEW ORLEANS 29-53.10N 089-56.70W.
   F. SAN JUAN 18-27.00N 066-06.00W.
2. CANCEL THIS MSG 021700Z OCT 26.

Reading this warning

DSC (Digital Selective Calling): The digital radio alert built into modern marine radios — one button sends a distress alert with the vessel's identity and position.
Inoperative / unreliable / off air: An aid or radio service is not working as charted or published.
Date-time group (DTG): A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
Position (degrees and minutes): How warnings write positions: degrees, a hyphen, then minutes, with N/S and E/W — 49-40.8N 003-43.8W.
CANCEL THIS MSG: The warning's own expiry: a line telling the reader when the message cancels itself.

All warning terms →

Collected reports in this area · aids-to-navigation notices

34 within 180 nm since 1998 · 5 in the last 12 months · 1 listed in force now

Counts include repeat notices about the same situation. NGA archive coverage ends 2024-05; live collection began 2026-08-17. The period between them is incomplete. An empty year is not evidence that no hazards occurred.

Month of issue in the collected archive

All available years combined. Uneven collection and repeat bulletins affect these counts; this chart does not measure the seasonality or probability of incidents.

Nearby notices listed in force · within 120 nm

Broadcast and communication services unreliable at uscg remote communication facilities: a. boston 41-43.00N…Nav aids · 17.3 nm

Worldwide in the collected sources

137 aids-to-navigation notices listed in force · see all

Record snapshot 2026-10-01 19:41Z; source collection times vary.

Nav aids

Lights extinguished, buoys off station, RACON/NAVTEX outages. All current aids-to-navigation notices →

Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.