Hydrographic operations 242300Z to 250900Z feb within 50 miles of 40-00N 144-00E
North Pacific Ocean · HYDROPAC 292/01
What this record establishes
Archived notice · 2001-02-25 10:00Z
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) · CTG 72.4 202330Z FEB 01. Issued 2001-02-21 13:47Z. 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 Pacific Ocean. The parsed report position is 40.000, 144.000 with a 50.0 nm radius. 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 North Pacific Ocean →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2001-02-24 23:00Z | 2001-02-25 09:00Z | — | 10 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2001-02-21 13:47Z
- status
- Archived notice
- self-cancels
- 2001-02-25 10:00Z
- authority
- CTG 72.4 202330Z FEB 01
- issued by
- CTG
- sea
- North Pacific Ocean
- position
- 40.000, 144.000 · r 50.0 nm
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. HYDROGRAPHIC OPERATIONS 242300Z TO 250900Z FEB WITHIN 50 MILES OF 40-00N 144-00E. 2. CANCEL THIS MSG 251000Z FEB.
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.
- 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.
Collected reports in this area · other warnings
3 within 180 nm since 1999 · 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
20 other warnings listed in force · see all
Record snapshot 2026-09-25 11:17Z; 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.