Surveys

Underwater operations 15 may thru 02 jun in areas: a. bound by 38-49.87N 008-54.89E, 38-56.47N 009-03.53E,…

Tyrrhenian Sea · HYDROLANT 1702/00

What this record establishes

Archived notice · 2000-06-03 00:00Z

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) · MARISARDEGNA 068/00 121330B MAY 00. Issued 2000-05-12 16:57Z. 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 parsed report position is 38.911, 8.731. 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 Tyrrhenian Sea →

issued
2000-05-12 16:57Z
status
Archived notice
authority
MARISARDEGNA 068/00 121330B MAY 00
issued by
MARISARDEGNA
sea
Tyrrhenian Sea
position
38.911, 8.731
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. UNDERWATER OPERATIONS 15 MAY THRU 02 JUN IN AREAS:
   A. BOUND BY 38-49.87N 008-54.89E, 38-56.47N 009-03.53E,
      38-58.79N 009-00.70E, 38-52.26N 008-52.03E.
   B. BOUND BY 38-51.00N 008-40.00E, 38-51.00N 008-46.50E,
      38-54.27N 008-46.50E, 38-55.05N 008-44.25E,
      38-53.00N 008-40.00E.
   C. BOUND BY 39-00.02N 008-28.59E, 39-00.02N 008-32.59E,
      38-57.08N 008-34.38E, 38-57.08N 008-27.17E.
   D. BOUND BY 38-58.30N 009-01.28E, 38-59.90N 009-03.26E,
      39-02.86N 009-05.03E.
   E. BOUND BY 39-11.32N 009-06.13E, 39-05.27N 009-07.80E,
      39-01.00N 009-11.20E, 39-00.00N 009-12.50E.
   F. BOUND BY 38-51.00N 008-53.56E, 38-50.00N 008-50.00E,
      38-50.00N 008-35.00E, 38-57.08N 008-30.00E.
   G. BOUND BY 38-57.08N 008-27.17E, 38-55.04N 008-23.29E,
      38-55.70N 008-20.31E, 38-58.75N 008-18.56E.
   H. BETWEEN 38-55.43N 38-53.12N AND 009-02.18E 009-08.32E.
   I. BETWEEN 38-51.85N 38-48.71N AND 008-57.50N 009-06.31E.
   1000 METER BERTH REQUESTED.
2. CANCEL THIS MSG 03 JUN.

Reading this warning

Underwater operations
Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
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 · survey operations

149 within 180 nm since 1998 · 0 in the last 12 months · 0 listed in force now

98
00
05
10
15
20
24

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

56 survey operations listed in force · see all

Record snapshot 2026-10-03 15:55Z; source collection times vary.

Surveys

Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →

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.