Hazardous operations 0001Z to 0800Z daily 15 thru 18 jan in area within five miles of 45-32.0N 141-18.5E
Japan Sea · HYDROPAC 138/18
What this record establishes
Archived notice · 2018-01-18 09:00Z
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) · NAVAREA XIII 3/18 110906Z JAN 18.. Issued 2018-01-11 09:39Z. 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 45.533, 141.308 with a 5.0 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Activity windows · 4 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2018-01-15 00:01Z | 2018-01-15 08:00Z | — | 7 h 59 |
| 2018-01-16 00:01Z | 2018-01-16 08:00Z | — | 7 h 59 |
| 2018-01-17 00:01Z | 2018-01-17 08:00Z | — | 7 h 59 |
| 2018-01-18 00:01Z | 2018-01-18 08:00Z | — | 7 h 59 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2018-01-11 09:39Z
- status
- Archived notice
- self-cancels
- 2018-01-18 09:00Z
- authority
- NAVAREA XIII 3/18 110906Z JAN 18.
- NAVAREA
- NAVAREA XIII · named as the source of this relay
- sea
- Japan Sea
- position
- 45.533, 141.308 · r 5.0 nm
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
SEA OF JAPAN. JAPAN. DNC 24. 1. HAZARDOUS OPERATIONS 0001Z TO 0800Z DAILY 15 THRU 18 JAN IN AREA WITHIN FIVE MILES OF 45-32.0N 141-18.5E. 2. CANCEL THIS MSG 180900Z JAN 18.
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.
- Hazardous operations
- NGA's heading for activities that make an area dangerous — most often rocket launches, space debris and weapons firings, and some open-ended danger areas.
- Within a radius of
- A circular area — every position within a stated distance of a point.
- 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.
- 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.
Collected reports in this area · military exercises
47 within 180 nm since 2012 · 1 in the last 12 months · 0 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.
- Gunnery exercises 142000Z to 151200Z aug in area bound by 45-33.00N 143-20.00E, 46-04.00N 143-26.00E,…2026-08-11
- Hazardous operations 2200Z to 1300Z daily 19 jun thru 14 jul in area bound by 47-01.00N 141-20.80E,…2025-06-16
- Gunnery exercises 2200Z to 1300Z daily 25 may to 19 jun in area bound by 47-01.00N 141-20.80E, 46-57.50N…2025-06-04
- Gunnery exercises 2200Z to 1300Z daily 23 jan thu 20 feb in area bound by 47-01.00N 141-20.80E, 46-57.50N…2025-01-18
- Gunnery exercises 2200Z to 1200Z daily 30 sep thru 24 oct in area bound by 47-01.00N 141-20.80E, 46-57.50N…2024-09-25
- Gunnery exercises 2200Z to 1200Z daily 17 thru 29 apr in area bound by 47-01.00N 141-20.80E, 46-57.50N…2024-04-16
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
No other collected notice is currently listed in force within this radius. This does not establish safe conditions.
Worldwide in the collected sources
10 military exercises listed in force · see all
Record snapshot 2026-10-03 05:50Z; source collection times vary.
Exercises
Gunnery, firing and naval exercise areas. All current military exercises →
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.