Other

Hydrographic operations 2300Z to 0900Z commencing daily 14 and 16 feb within 50 miles of 40-00N 144-00E

North Pacific Ocean · HYDROPAC 226/01

What this record establishes

Archived notice · 2001-02-17 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 130300Z FEB 01; AUSCOAST 130732Z FEB 01. Issued 2001-02-13 07:55Z. 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.

Related notices and cancellation links

Current notices and reporting history in the North Pacific Ocean →

issued
2001-02-13 07:55Z
status
Archived notice
self-cancels
2001-02-17 10:00Z
authority
CTG 72.4 130300Z FEB 01; AUSCOAST 130732Z 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 2300Z TO 0900Z COMMENCING
   DAILY 14 AND 16 FEB WITHIN 50 MILES OF 40-00N 144-00E.
2. CANCEL HYDROPAC 189/01(75), AID RESTORED.
3. CANCEL THIS MSG 171000Z FEB.

Reading this warning

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.
Cancellation reference
A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
HYDROPAC
The U.S. long-range warning series for the Pacific outside NAVAREA XII and for the Indian Ocean, Persian Gulf and adjoining seas.
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.

All warning terms →

Collected reports in this area · other warnings

3 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now

99
00
01

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

20 other warnings listed in force · see all

Record snapshot 2026-09-25 13:26Z; 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.