Other

Mine clearing operations 231000Z to 241000Z apr by M/V HMS enterprise, M/V esps segura, M/V tgc anamur and…

Tyrrhenian Sea · HYDROLANT 1241/18

What this record establishes

Archived notice · 2018-04-24 11:00Z

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) · NAVAREA III 330/18 191201Z APR 18.. Issued 2018-04-19 12:07Z. 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 an area described by the warning; the listed coordinate is its representative center. 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
2018-04-23 10:00Z	2018-04-24 10:00Z	—	24 h

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

issued: 2018-04-19 12:07Z
status: Archived notice
self-cancels: 2018-04-24 11:00Z
authority: NAVAREA III 330/18 191201Z APR 18.
NAVAREA: NAVAREA III · named as the source of this relay
sea: Tyrrhenian Sea
position: 43.903, 9.974
vessels: M/V ENTERPRISE · 4 messages M/V ESPS SEGURA M/V ITS ALGEHERO M/V TGC ANAMUR
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

TYRRHENNIAN SEA.
ITALY.
DNC 08.
1. MINE CLEARING OPERATIONS 231000Z TO 241000Z APR
   BY M/V HMS ENTERPRISE, M/V ESPS SEGURA,
   M/V TGC ANAMUR AND M/V ITS ALGEHERO WITH
   SUBMERSIBLE IN AREA BOUND BY
   43-56.7N 009-56.0E, 43-52.4N 010-01.9E,
   43-51.7N 010-00.9E, 43-56.0N 009-55.0E.
   1000 METER BERTH REQUESTED.
2. CANCEL THIS MSG 241100Z APR 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.
Mines and mine danger areas: Sea mines reported adrift or found, and areas where mines are known or suspected to remain.
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.
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

59 within 180 nm since 1996 · 1 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

23 other warnings listed in force · see all

Record snapshot 2026-10-01 21:51Z; 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.