Navigation prohibited 071400Z to 131400Z sep in area bound by 67-59.1N 176-10.6W, 67-55.2N 175-48.4W,…
Chukchi Sea · HYDROARC 221/18
What this record establishes
Archived notice · 2018-09-09 09:02Z
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 22/18 041000Z SEP 18.. Issued 2018-09-04 10:13Z. 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
- Cancel HYDROARC 221/18 and this msglater cancellation notice
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2018-09-07 14:00Z | 2018-09-13 14:00Z | — | 144 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2018-09-04 10:13Z
- status
- Archived notice
- self-cancels
- 2018-09-13 15:00Z
- authority
- RUSSIA COASTAL WARNING EAST 22/18 041000Z SEP 18.
- issued by
- RUSSIA COASTAL WARNING EAST
- sea
- Chukchi Sea
- position
- 67.916, -175.995
- 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. CHART 96036. 1. NAVIGATION PROHIBITED 071400Z TO 131400Z SEP IN AREA BOUND BY 67-59.1N 176-10.6W, 67-55.2N 175-48.4W, 67-51.0N 175-48.4W, 67-54.4N 176-10.6W. 2. CANCEL THIS MSG 131500Z SEP 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.
- Chart reference
- The number of the nautical chart on which the reported position lies.
- Navigation prohibited
- Ships may not enter or pass through the area, or a port is closed to traffic.
- 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.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · restricted areas & port closures
2 within 180 nm since 2018 · 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.
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
2 restricted areas & port closures listed in force · see all
Record snapshot 2026-10-03 01:21Z; source collection times vary.
Restricted
Navigation prohibited, exclusion and security zones, ports closed to traffic. All current restricted areas & port closures →
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.