Survey operations by the vessel Trimurti are ongoing in the Arabian Sea off India from 15 July to 14 August; wide berth requested.
Arabian Sea · HYDROPAC 2027/26
What this record establishes
Cancelled notice · 2026-08-21 15:40Z
This notice disappeared from the issuing source's in-force list. No explicit recovery or all-clear is established by that removal.
- Source and dates
- NGA MSI in-force warnings (DailyMem*.txt). Issued 2026-07-15 13:55Z. First collected 2026-08-17 13:41Z; last seen in collection 2026-08-23 13:02Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- Arabian 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.
- issued
- 2026-07-15 13:55Z
- status
- Cancelled notice
- self-cancels
- 2026-08-15 00:01Z
- sea
- Arabian Sea
- position
- 19.081, 72.736
- vessel
- M/V TRIMURTI
- nearest port
- Jawaharlal Nehru Port · 14 nm
- source
- NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-08-17 13:41Z
Original warning text
ARABIAN SEA. INDIA. 1. SURVEY OPERATIONS 15 JUL THRU 14 AUG BY M/V TRIMURTI IN AREA BOUND BY 19-07.08N 072-48.20E, 19-05.68N 072-46.66E, 19-03.76N 072-42.33E, 19-01.07N 072-41.73E, 19-01.80N 072-41.19E, 19-04.24N 072-41.39E, 19-07.50N 072-47.72E. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 150001Z AUG 26.
Reading this warning
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- 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.
- 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.
Collected reports in this area · survey operations
600 within 180 nm since 2003 · 27 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.
- Survey operations 30 sep thru 13 nov by M/V oceanic sirius in area bound by 18-16.00N 071-45.00E, 18-30.00N…2026-09-29
- Survey operations in progress by kohinoor 1 until 12 oct, and M/V fugro mapper until 15 oct in areas bounded…2026-09-22
- Survey operations 17 sep thru 15 oct by M/V fugro mapper in areas bound by: a. 20-22.00N 071-18.00E,…2026-09-16
- Survey operations 11 sep thru 26 oct by M/V vanessa 6 in area bound by 19-30.97N 071-21.32E, 19-35.32N…2026-09-10
- Survey operations 01 thru 30 apr by M/V vanessa 7 in area bound by 19-23.19N 071-17.41E, 19-23.60N…2026-03-30
- Survey operations 01 thru 30 apr 26 by M/V vanessa 6 towing 150 meter long cable in area bound by 20-13.31N…2026-03-30
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
Worldwide in the collected sources
55 survey operations listed in force · see all
Record snapshot 2026-10-01 10:08Z; 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.