Nav aids

NAVTEX station yokohama (I) 35-14.6N 139-55.3E off air 230555Z to 230740Z and 260555Z to 260950Z feb

Japan Sea · HYDROPAC 596/17

What this record establishes

Archived notice · 2017-02-26 10:50Z

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) · NAVAREA XI 127/17 172315Z FEB 17.. Issued 2017-02-17 23:22Z. 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
Japan Sea. The parsed report position is 37.405, 138.482. 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 Japan Sea →

Activity windows · 2 in this warning

opens (UTC)closes (UTC)locallength
2017-02-23 05:55Z2017-02-23 07:40Z—1 h 45
2017-02-26 05:55Z2017-02-26 09:50Z—3 h 55

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

issued
2017-02-17 23:22Z
status
Archived notice
self-cancels
2017-02-26 10:50Z
authority
NAVAREA XI 127/17 172315Z FEB 17.
NAVAREA
NAVAREA XI · named as the source of this relay
sea
Japan Sea
position
37.405, 138.482
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

WESTERN NORTH PACIFIC.
PHILIPPINE SEA.
JAPAN.
DNC 12, DNC 23, DNC 24.
1. NAVTEX STATION YOKOHAMA (I) 35-14.6N 139-55.3E
   OFF AIR 230555Z TO 230740Z AND
   260555Z TO 260950Z FEB. YOKOHAMA BROADCASTS
   WILL BE TRANSMITTED FROM NAVTEX STATIONS:
   A. MOJI (H) 34-00.9N 130-56.1E.
   B. KUSHIRO (K) 42-57.4N 144-35.4E.
2. CANCEL THIS MSG 261050Z FEB 17.

Reading this warning

DNC (Digital Nautical Chart)
A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
NAVTEX
An automated medium-frequency radio service that sends coastal warnings as text to a small printer or screen on board.
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.
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.
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

7 within 180 nm since 2000 · 0 in the last 12 months · 0 listed in force now

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

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

Record snapshot 2026-10-02 17:01Z; 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.