Incidents · aircraft

Distress signal received on 406 mhz from aircraft in 34-06.4N 134-20.7W at 271651Z mar

North Pacific Ocean · HYDROPAC 876/12

What this record establishes

Archived notice · 2012-03-31 09:57Z

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) · RCC ALAMEDA 271651Z MAR 12.. Issued 2012-03-27 18:39Z. 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: North Pacific Ocean. The parsed report position is 34.107, -134.345. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Original warning text

EASTERN NORTH PACIFIC.
1. DISTRESS SIGNAL RECEIVED ON 406 MHZ FROM AIRCRAFT
   IN 34-06.4N 134-20.7W AT 271651Z MAR. VESSELS IN
   VICINITY REQUESTED TO KEEP SHARP LOOKOUT, ASSIST
   IF POSSIBLE. REPORTS TO RCC ALAMEDA,
   TELEX: 230172343, PHONE: 510 437 3701,
   E-MAIL: RCCALAMEDA@USCG.MIL.
2. CANCEL HYDROPAC 875/12.

Reading this warning

Distress signal received: A rescue centre has received an alert — from a beacon, a radio call or a satellite terminal — and is asking ships to look.
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.
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.
Keep a sharp lookout: A request to every ship in the area to watch for the vessel, people or object described.
Assist if possible: The second half of the standard rescue request: ships able to help are asked to do so.
RCC / JRCC (Rescue Coordination Centre): The centre that organises search and rescue in its region; warnings ask ships to send their reports there.
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.

All warning terms →

Collected reports in this area · distress & casualty cases (archived)

34 within 180 nm since 2010 · 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.

Distress signal received on 406 mhz from aircraft in 33-05.00N 134-41.00W2023-10-04
Distress signal received on 406 mhz in 33-20.70N 136-24.60W2023-05-05
Distress signal received on 406 mhz in 36-35.3N 136-24.2W2022-05-05
Distress signal received on 406 mhz in 36-35.3N 136-24.2W2022-05-05
Distress signal received on 406 mhz in 32-21.1N 137-02.8W2020-03-29
Eastern north pacific DNC 132019-08-22

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

0 distress & casualty cases (archived) listed in force · see all

Record snapshot 2026-09-24 21:07Z; source collection times vary.

Incidents

Search-and-rescue broadcasts, published only once a case has been closed for 30 days: groundings, sinkings, capsizes, fires, man overboard, overdue vessels. Nothing here is live. All current distress & casualty cases (archived) →

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.