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Underwater survey 182259Z to 212300Z dec by M/V argonaut with equipment along trackline between 41-17.9N…

Tyrrhenian Sea · HYDROLANT 4128/00

What this record establishes

Archived notice · 2000-12-21 23:59Z

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) · MARDIPART LA SPEZIA 404/00 151152Z DEC 00. Issued 2000-12-15 15:35Z. 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: Tyrrhenian Sea. The map shows the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.

Current notices and reporting history in the Tyrrhenian Sea →

Activity windows · 1 in this warning

opens (UTC)	closes (UTC)	local	length
2000-12-18 22:59Z	2000-12-21 23:00Z	—	72 h 01

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

issued: 2000-12-15 15:35Z
status: Archived notice
self-cancels: 2000-12-21 23:59Z
authority: MARDIPART LA SPEZIA 404/00 151152Z DEC 00
issued by: MARDIPART LA SPEZIA
sea: Tyrrhenian Sea
position: 41.454, 12.329
vessel: M/V ARGONAUT · 7 messages
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. UNDERWATER SURVEY 182259Z TO 212300Z DEC BY M/V ARGONAUT
   WITH EQUIPMENT ALONG TRACKLINE BETWEEN 41-17.9N 012-17.1E
   AND 41-36.6N 012-22.4E. WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 212359Z DEC.

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.
Track line joining: Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
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.
Wide berth requested: Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
CANCEL THIS MSG: The warning's own expiry: a line telling the reader when the message cancels itself.

All warning terms →

Collected reports in this area · other warnings

37 within 180 nm since 1998 · 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.

Clean up operations in progress until further notice in area within ten miles of 43-14.9N 009-28.7E2018-10-11
Red flare sighted in 43-29N 009-24E at 191900Z feb2015-02-19
F/V uragano on fire in 41-58N 010-07E2014-10-05
Diver missing vicinity 42-20.2N 010-55.8E at 100945Z oct2010-10-10
Windsurfer missing vicinity torre mileto (41-55N 015-37E)2008-11-03
Capo ferro light 41-09.3N 009-31.4E at reduced intensity2006-06-01

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

21 other warnings listed in force · see all

Record snapshot 2026-10-03 13:11Z; 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.