Surveys

NAVAREA IV mobile offshore drilling units positions at 221350Z sep: a. argos 27-10.4N 090-21.9W

Caribbean Sea · NAVAREA IV 861/21

What this record establishes

Archived notice · 2021-09-29 15:12Z

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) · SFH 221438Z SEP 21.. Issued 2021-09-22 14:39Z. 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
Caribbean Sea. The parsed report position is 19.473, -82.040. 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

Current notices and reporting history in the Caribbean Sea →

issued
2021-09-22 14:39Z
status
Archived notice
authority
SFH 221438Z SEP 21.
NAVAREA
NAVAREA IV
issued by
SFH
sea
Caribbean Sea
position
19.473, -82.040
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. NAVAREA IV MOBILE OFFSHORE DRILLING UNITS
   POSITIONS AT 221350Z SEP:
   A. ARGOS 27-10.4N 090-21.9W.
   B. BLAKE 651 28-23.5N 089-27.2W.
   C. COATZACOALCOS 18-49.8N 091-50.5W.
   D. COSLHUNTER 18-46.0N 093-13.0W.
   E. DEEPWATER ASGARD 27-55.9N 090-12.0W
      (NEW POSITION).
   F. DEEPWATER CONQUEROR 26-17.8N 091-05.6W.
   G. DEEPWATER INVICTUS 10-49.5N 061-35.0W.
   H. DEEPWATER PONTUS 26-27.3N 090-46.2W.
   I. DISCOVERER INSPIRATION 27-41.5N 091-06.8W.
   J. ENSCO 102 28-12.1N 091-32.3W.
   K. ENSCO 12 06-20.0N 055-25.5W.
   L. ENSCO 8503 27-30.1N 092-50.8W.
   M. ENSCO 8505 18-59.5N 093-15.9W.
   N. ENTERPRISE 205 28-35.0N 091-16.8W.
   O. ENTERPRISE 264 28-45.5N 090-56.0W.
   P. FPSO LIZA DESTINY 08-00.0N 057-00.0W.
   Q. FRIDA I 18-53.6N 093-31.0W.
   R. GALAR 18-28.8N 093-27.5W.
   S. GERSEMI 18-29.3N 093-20.7W.
   T. GRID 18-42.7N 093-22.5W.
   U. GSF TRANSOCEAN DEVELOPMENT DRILLER III
      11-28.3N 059-27.9W.
   V. GSP ATLAS 19-36.0N 090-58.1W.
   W. GSP ORIZONT 19-36.0N 090-58.0W.
   X. HELIX Q5000 27-40.1N 090-16.5W.
   Y. HOLSTEIN SPAR 27-19.3N 090-32.1W.
   Z. JOE DOUGLAS 10-39.1N 061-37.3W.
   AA. MAERSK DEVELOPER 07-25.5N 056-00.5W.
   AB. MAERSK DISCOVERER 07-27.8N 056-24.7W.
   AC. MAERSK VALIANT 07-50.2N 055-56.5W.
   AD. MODS 200 28-06.1N 090-12.1W.
   AE. NABORS 202 28-47.5N 089-03.4W.
   AF. NJORD 18-33.2N 092-52.2W.
   AG. NOBLE BOB DOUGLAS 08-03.5N 056-57.5W.
   AH. NOBLE DON TAYLOR 08-15.4N 057-00.5W
       (NEW POSITION).
   AI. NOBLE REGINA ALLEN 10-45.2N 060-31.5W.
   AJ. NOBLE SAM CROFT 08-06.5N 056-56.5W
       (NEW POSITION).
   AK. NOBLE TOM MADDEN 07-49.0N 056-29.6W
       (NEW POSITION).
   AL. OCEAN BLACKHAWK 28-53.6N 087-59.1W.
   AM. OCEAN BLACKHORNET 27-09.7N 090-17.8W
       (NEW POSITION).
   AN. OCEAN BLACKLION 28-26.3N 088-16.8W.
   AO. ODIN 18-18.8N 094-15.8W.
   AP. PACIFIC SHARAV 28-33.6N 088-06.4W.
   AQ. PAPALOAPAN 18-26.7N 094-08.2W.
   AR. RALPH COFFMAN 10-40.5N 061-38.9W.
   AS. ROWAN EXL II 10-02.9N 060-24.9W.
   AT. ROWAN RELENTLESS 28-57.2N 088-15.0W.
   AU. ROWAN RESOLUTE 28-00.9N 088-45.1W.
   AV. SEADRILL WEST VELA 27-08.6N 090-16.1W.
   AW. SEVAN LOUISIANA 28-52.0N 090-09.1W.
   AX. SS 198 28-35.1N 091-15.3W.
   AY. SS 266 28-21.4N 091-05.3W.
   AZ. STENA CARRON 07-52.4N 056-37.0W
       (NEW POSITION).
   AAA. STENA DRILLMAX 08-04.4N 056-13.2W.
   AAB. STENA ICEMAX 18-58.0N 094-02.3W.
   AAC. TUXPAN 18-45.7N 091-45.7W.
   AAD. WEST CAPRICORN 28-14.9N 089-55.3W.
   AAE. WEST COURAGEOUS 19-33.8N 092-16.2W.
   AAF. WEST INTREPID 19-35.4N 092-13.2W.
   AAG. WEST NEPTUNE 27-41.5N 091-06.8W.
   AAH. WFD 250 29-07.8N 094-32.8W.
   AAI. WFD 300 28-13.7N 092-31.8W.
   AAJ. WFD 350 28-45.7N 091-41.8W.
2. TO REPORT A MOBILE OFFSHORE DRILLING UNIT AS
   PER IMO RESOLUTION A.1023(26), PARAGRAPH 11.5.1,
   CONTACT NAVSAFETY@NGA.MIL SUBJ: MODU REPORT.
3. CANCEL NAVAREA IV 837/21.

Reading this warning

NAVAREA
One of the 21 ocean areas of the World-Wide Navigational Warning Service, each with a coordinator that broadcasts long-range warnings.
Drilling rig / MODU
A mobile offshore drilling unit — jack-up, semi-submersible or drillship — has moved into position, with anchors and a safety zone around it.
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.
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.
Cancellation reference
A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.

All warning terms →

Collected reports in this area · survey operations

74 within 180 nm since 2021 · 1 in the last 12 months · 0 listed in force now

21
25
26

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

J
F
M
A
M
J
J
A
S
O
N
D

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

55 survey operations listed in force · see all

Record snapshot 2026-09-27 23:51Z; 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.