Hazardous operations 222100Z to 272100Z in area bound by 69-50N 180-00W, 69-50N 179-00W, 69-30N 179-00W,…
Chukchi Sea · HYDROARC 203/20
What this record establishes
Archived notice · 2020-09-27 22:00Z
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) · RUSSIA COASTAL WARNING EAST 30/20 221101Z SEP 20.. Issued 2020-09-22 11:06Z. 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
- Chukchi Sea. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
Related notices and cancellation links
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2020-09-22 21:00Z | 2020-09-27 21:00Z | — | 120 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2020-09-22 11:06Z
- status
- Archived notice
- self-cancels
- 2020-09-27 22:00Z
- authority
- RUSSIA COASTAL WARNING EAST 30/20 221101Z SEP 20.
- issued by
- RUSSIA COASTAL WARNING EAST
- sea
- Chukchi Sea
- position
- 69.667, -179.500
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
CHUKCHI SEA. RUSSIA. DNC 27. 1. HAZARDOUS OPERATIONS 222100Z TO 272100Z IN AREA BOUND BY 69-50N 180-00W, 69-50N 179-00W, 69-30N 179-00W, 69-30N 180-00W. 2. CANCEL HYDROARC 202/20. 3. CANCEL THIS MSG 272200Z SEP 20.
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.
- 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.
- Area bound by
- Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
- 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.
- HYDROARC
- The U.S. long-range warning series for the Arctic Ocean.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · military exercises
8 within 180 nm since 2020 · 0 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.
- Hazardous operations 1400Z to 0800Z daily 18 thru 24 sep in area bound by 68-05.30N 176-23.00W, 67-54.80N…2023-09-14
- Hazardous operations 2000Z to 0300Z daily 19 thru 22 sep in area bound by 69-50.00N 179-00.00W, 69-50.00N…2023-09-14
- Hazardous operations 031400Z to 041400Z feb in area bound by 68-20N 177-40W, 70-15N 175-00W, 69-05N 171-20W,…2022-02-03
- Gunnery exercises 2200Z to 0200Z daily, 24 thru 28 oct in area bound by 68-22N 175-19W, 68-28N 176-00W,…2021-10-21
- Hazardous operations 222100Z to 262100Z sep in area bound by 69-50N 180-00W, 69-50N 179-00W, 69-30N 179-00W,…2020-09-22
- Hazardous operations 202100Z to 222100Z sep in area bound by 69-50N 180-00W, 69-50N 179-00W, 69-30N 179-00W,…2020-09-16
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
28 military exercises listed in force · see all
Record snapshot 2026-10-01 14:02Z; 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.