Survey operations in progress until 31 oct by M/V pgs apollo towing six 14 meter long cables in area bound…
South Atlantic Ocean · HYDROLANT 2700/22
What this record establishes
Archived notice · 2022-11-01 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 V 551/22 240236Z OCT 22.. Issued 2022-10-24 03:07Z. 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
- South Atlantic Ocean. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
Related notices and cancellation links
Current notices and reporting history in the South Atlantic Ocean →
- issued
- 2022-10-24 03:07Z
- status
- Archived notice
- self-cancels
- 2022-11-01 00:01Z
- authority
- NAVAREA V 551/22 240236Z OCT 22.
- NAVAREA
- NAVAREA V · named as the source of this relay
- sea
- South Atlantic Ocean
- position
- -22.012, -39.711
- vessel
- M/V PGS APOLLO · 81 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. BRAZIL. DNC 01. 1. SURVEY OPERATIONS IN PROGRESS UNTIL 31 OCT BY M/V PGS APOLLO TOWING SIX 14 METER LONG CABLES IN AREA BOUND BY 21-46.90S 039-24.56W, 21-46.74S 040-00.80W, 22-05.62S 040-00.93W, 22-06.17S 040-00.63W, 22-09.14S 040-00.07W, 22-09.14S 040-00.05W, 22-11.69S 040-00.28W, 22-12.25S 040-00.54W, 22-12.91S 040-00.98W, 22-14.65S 040-01.00W, 22-14.81S 039-24.63W. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 2633/22. 3. CANCEL THIS MSG 010001Z NOV 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.
- 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.
- 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.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROLANT
- The U.S. long-range warning series for Atlantic waters outside NAVAREA IV, including the eastern Atlantic, the Mediterranean and adjoining seas.
- 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
748 within 180 nm since 2000 · 60 in the last 12 months · 4 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 0800Z to 1800Z daily 02 thru 16 oct by M/V comando b and M/V top weather in 20-23.85S…2026-10-01
- Underwater operations in progress until 120259Z oct by M/V sistac vitoria in 22-32.82S 040-04.05W2026-09-30
- Underwater operations in progress until 090259Z oct by M/V siem pilot in 22-25.32S 039-56.55W2026-09-29
- Underwater operations 0800Z to 1800Z daily 28 sep thru 12 oct by M/V calypso and M/V commando b in 20-23.18S…2026-09-27
- Underwater operations 0800Z to 1800Z daily 27 sep thru 11 oct by M/V comando b and M/V prime star in…2026-09-26
- Underwater operations 0800Z to 1800Z daily 26 sep thru 10 oct by M/V comando b in 19-51.63S 039-56.90W2026-09-25
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
- Underwater operations 1000Z to 2000Z daily until 02 nov 26 by M/V fugro vaquita in: a. 22-26.32S 040-25.47WSurveys · 47.1 nm
- Underwater operations in progress until 140001Z nov by M/V fugro vaquita in area bound by 22-03.00S…Surveys · 54.6 nm
- Underwater operations 0800Z to 1800Z daily 26 sep thru 10 oct by M/V comando b in 20-23.78S 040-09.43WSurveys · 100.2 nm
Worldwide in the collected sources
55 survey operations listed in force · see all
Record snapshot 2026-10-02 06:09Z; 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.