Survey operations 06 thru 31 aug by M/V urania towing equipment and cables: a. in area between 38-15N 39-45N…
Tyrrhenian Sea · HYDROLANT 1623/99
What this record establishes
Archived notice · 1999-08-23 17:12Z
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 341/99 AOR-E EGC #022 051258Z AUG 99. Issued 1999-08-05 14:29Z. 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 39.084, 14.717. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Survey operations 24 thru 30 aug by M/V urania along trackline joining 41-11.5N 016-56.0E, 41-19.0N…later cancellation notice
Current notices and reporting history in the Tyrrhenian Sea →
- issued
- 1999-08-05 14:29Z
- status
- Archived notice
- authority
- NAVAREA III 341/99 AOR-E EGC #022 051258Z AUG 99
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Tyrrhenian Sea
- position
- 39.084, 14.717
- vessel
- M/V URANIA · 135 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. SURVEY OPERATIONS 06 THRU 31 AUG BY M/V URANIA TOWING EQUIPMENT AND CABLES: A. IN AREA BETWEEN 38-15N 39-45N AND 014-15E 015-15E. B. IN AREA BETWEEN 37-15N 37-35N AND 015-20E 015-35E. C. WITHIN 20 MILES OF 39-05N 014-43E. D. VICINITY 36-09N 016-20E. 2. CANCEL THIS MSG 01 SEP.
Reading this warning
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- Towed array / streamer
- Equipment towed a long way behind a vessel — sonar, a hydrophone cable, a sampling sled — invisible at the surface.
- Tow / towing
- A vessel towing another vessel, a barge or a structure — slow, hard to manoeuvre, and with a long line between.
- 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.
- Within a radius of
- A circular area — every position within a stated distance of a point.
- 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
220 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
- Underwater operations by M/V handin tide with submersible: a. 01 thru 05 jun in area within ten miles of…2022-05-27
- Survey operations 13 thru 21 feb by M/V havila phoenix with submersible along trackline joining 35-56.56N…2022-02-11
- Underwater operations by M/V handin tide: a. 01 thru 05 sep in area within ten miles of 37-30-00N 015-23-02E2021-08-30
- Survey operations in progress until 22 jul in areas bound by: a. 35-54.54N 012-48.96E, 35-54.54N 012-55.38E,…2021-06-25
- Survey operations in progress until 15 jul by M/V astrea in area bound by 37-25.7N 012-35.8E, 37-25.7N…2021-06-08
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 2026-10-03 19:16Z; 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.