Nav aids

Hf and mf services unreliable 181500Z to 181600Z oct at uscg remote communication facilities: a. boston…

Pacific Ocean · HYDROPAC 3299/23

What this record establishes

Archived notice · 2023-10-18 17:00Z

This notice comes from the historical archive. Its archived status does not establish when or how the reported situation ended.

Source and dates
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · COGARD COMMUNICATIONS COMMAND 0/23 162102Z OCT 23.. Issued 2023-10-17 01:33Z. First collected 2026-08-17 13:38Z; last seen in collection 2026-08-17 15:46Z. Collection dates record ingestion, not a new incident or a fresh field observation.
Location covered
Pacific Ocean. The parsed report position is 33.122, -83.765. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Related notices and cancellation links

Activity windows · 1 in this warning

opens (UTC)closes (UTC)locallength
2023-10-18 15:00Z2023-10-18 16:00Z—1 h

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

issued
2023-10-17 01:33Z
status
Archived notice
self-cancels
2023-10-18 17:00Z
authority
COGARD COMMUNICATIONS COMMAND 0/23 162102Z OCT 23.
issued by
COGARD COMMUNICATIONS COMMAND
position
33.122, -83.765
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

PACIFIC OCEAN.
1. HF AND MF SERVICES UNRELIABLE 181500Z TO 181600Z OCT
   AT USCG REMOTE COMMUNICATION FACILITIES:
   A. BOSTON (NMF) 41-43.00N 070-31.00W
   B. CHESAPEAKE (NMN) 36-44.00N 076-01.00W
   C. MIAMI (NMA) 25-30.00N 080-23.00W
   D. NEW ORLEANS (NMG) 29-53.00N 089-57.00W
   E. HONOLULU (NMO) 21-22.00N 158-09.00W
   F. PT. REYES (NMC) 37-55.00N 122-44.00W
   G. KODIAK (NOJ) 57-46.00N 152-34.00W
   H. GUAM (NRV) 13-29.00N 114-50.00E
   I. CAMBRIA (NMQ) 33-44.00N 118-24.00W.
2. CANCEL THIS MSG 181700Z OCT 23.

Reading this warning

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

25 within 180 nm since 1996 · 0 in the last 12 months · 0 listed in force now

96
00
05
10
15
20
24

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

J
F
M
A
M
J
J
A
S
O
N
D

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

No other collected notice is currently listed in force within this radius. This does not establish safe conditions.

Worldwide in the collected sources

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

Record snapshot 2026-10-01 19:45Z; 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.