Other

Transmit services degraded 181400Z to 181600Z dec at uscg remote communication facilities: a. boston (f)…

North Atlantic Ocean · NAVAREA IV 1465/23

What this record establishes

Archived notice · 2023-12-18 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 171043Z DEC 23.. Issued 2023-12-17 11:45Z. 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
North Atlantic Ocean. The parsed report position is 30.736, -77.444. 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

Current notices and reporting history in the North Atlantic Ocean →

Activity windows · 1 in this warning

opens (UTC)closes (UTC)locallength
2023-12-18 14:00Z2023-12-18 16:00Z—2 h

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

issued
2023-12-17 11:45Z
status
Archived notice
self-cancels
2023-12-18 17:00Z
authority
COGARD COMMUNICATIONS COMMAND 0/23 171043Z DEC 23.
NAVAREA
NAVAREA IV
issued by
COGARD COMMUNICATIONS COMMAND
sea
North Atlantic Ocean
position
30.736, -77.444
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

UNITED STATES.
1. TRANSMIT SERVICES DEGRADED 181400Z TO 181600Z DEC
   AT USCG REMOTE COMMUNICATION FACILITIES:
   A. BOSTON (F) 41-43.0N 070-31.0W
   B. CHESAPEAKE (N) 36-44.0N 076-01.0W
   C. MIAMI (A) 25-30.0N 080-23.0W
   D. NEW ORLEANS (G) 29-53.0N 089-57.0W
   E. CHARLESTON (E) 32-08.0N 081-42.0W
   F. SAN JUAN (R) 18-27.0N 066-06.0W
2. CANCEL NAVAREA IV 1462/23.
3. CANCEL THIS MSG 181700Z DEC 23.

Reading this warning

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.
Cancellation reference
A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
NAVAREA
One of the 21 ocean areas of the World-Wide Navigational Warning Service, each with a coordinator that broadcasts long-range warnings.
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 · other warnings

20 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now

99
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

Worldwide in the collected sources

23 other warnings listed in force · see all

Record snapshot 2026-10-01 20:29Z; source collection times vary.

Other

Everything the classifier did not place elsewhere. All current other warnings →

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.