Survey operations 01 feb thru 30 apr by M/V latlante in: a. along trackline joining 39-13.67N 010-40.94E,…
Tyrrhenian Sea · HYDROLANT 283/21
What this record establishes
Archived notice · 2021-04-16 14:10Z
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 94/21 310101Z JAN 21.. Issued 2021-01-31 00:27Z. 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 38.483, 12.450. 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
- 2021-01-31 00:27Z
- status
- Archived notice
- authority
- NAVAREA III 94/21 310101Z JAN 21.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Tyrrhenian Sea
- position
- 38.483, 12.450
- vessel
- M/V LATLANTE
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
WESTERN MEDITERRANEAN SEA.
TYRRHENIAN SEA.
SICILY.
DNC 08, DNC 09.
1. SURVEY OPERATIONS 01 FEB THRU 30 APR
BY M/V LATLANTE IN:
A. ALONG TRACKLINE JOINING
39-13.67N 010-40.94E, 39-14.64N 011-02.34E,
39-16.07N 011-25.61E, 39-17.28N 011-46.24E,
39-18.52N 012-08.44E, 39-19.80N 012-30.00E,
39-27.38N 012-45.98E, 39-35.15N 013-02.05E,
39-45.98N 013-18.82E, 39-55.22N 013-33.21E.
B. ALONG TRACKLINE JOINING
38-38.05N 010-37.20E, 38-29.19N 010-56.98E,
38-23.34N 011-10.62E, 38-16.70N 011-24.00E,
38-10.58N 011-36.68E, 38-05.90N 011-46.98E,
38-01.11N 011-55.99E, 37-56.08N 012-10.16E,
37-49.50N 011-57.58E, 37-42.97N 011-45.32E,
37-36.09N 011-32.76E.
C. ALONG TRACKLINE JOINING
38-10.63N 012-35.55E, 38-24.63N 012-34.71E,
38-39.65N 012-33.35E, 38-53.49N 012-32.52E.
D. 38-17.68N 016-34.9473E
E. ALONG TRACKLINE JOINING
35-58.13N 015-33.35E, 36-02.20N 015-42.05E,
36-11.05N 016-01.44E, 36-19.69N 016-19.87E.
WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 01 MAY 21.
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.
- 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.
Collected reports in this area · survey operations
283 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.
- Underwater operations in progress until further notice by M/V joides resolution in: a. 40-11.03N 012-42.49E2024-02-16
- Survey operations 10 apr thru 10 may by M/V dalla porta in: a. 37-23.06N 011-35.59E2022-04-08
- Survey operations 13 thru 21 feb by M/V havila phoenix with submersible along trackline joining 35-56.56N…2022-02-11
- Survey operations in progress until 12 mar 22 by M/V artabro in area bound by 36-46.3N 011-01.8E, 37-01.5N…2021-10-30
- Survey operations in progress until 12 mar 22 by M/V viccica in area bound by 36-48.5N 011-02.9E, 36-46.8N…2021-10-30
- Survey operations in progress until 01 nov by M/V artabro in area bound by 36-47.4N 011-04.3E, 37-14.2N…2021-10-25
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 13:45Z; 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.