Surveys

Survey operations 10 apr thru 10 may by M/V dalla porta in: a. 37-23.06N 011-35.59E

Mediterranean Sea - Eastern Basin · HYDROLANT 1000/22

What this record establishes

Archived notice · 2022-05-11 00:01Z

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 141/22 081208Z APR 22.. Issued 2022-04-08 13:10Z. 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: Mediterranean Sea - Eastern Basin. The parsed report position is 37.307, 11.546. 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 Mediterranean Sea - Eastern Basin →

issued: 2022-04-08 13:10Z
status: Archived notice
authority: NAVAREA III 141/22 081208Z APR 22.
NAVAREA: NAVAREA III · named as the source of this relay
sea: Mediterranean Sea - Eastern Basin
position: 37.307, 11.546
vessel: M/V DALLA PORTA · 13 messages
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

MEDITERRANEAN SEA.
STRAIT OF SICILY
TUNISIA.
DNC 08.
1. SURVEY OPERATIONS 10 APR THRU 10 MAY
   BY M/V DALLA PORTA IN:
   A. 37-23.06N 011-35.59E.
   B. 37-17.26N 011-29.95E.
   C. 37-16.79N 011-29.17E.
   D. 37-18.83N 011-33.75E.
   E. 37-21.93N 011-39.70E.
   F. 37-10.80N 011-24.11E.
   G. 37-13.58N 011-23.79E.
   H. 37-13.98N 011-25.98E.
   I. 37-20.33N 011-36.01E.
   J. 37-27.66N 011-49.80E.
   1000 METER BERTH REQUESTED.
2. CANCEL THIS MSG 11 MAY 22.

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.
Survey operations: A research or survey vessel is mapping the seabed or water column, often while towing equipment.
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

266 within 180 nm since 1999 · 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.

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

56 survey operations listed in force · see all

Record snapshot 2026-10-01 21:45Z; 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.