Surveys

NAVAREA IV mobile offshore drilling units positions at 271429Z apr: a. argos 27-10.4N 090-21.9W

Caribbean Sea · NAVAREA IV 402/22

What this record establishes

Archived notice · 2022-05-04 18:46Z

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 271457Z APR 22.. Issued 2022-04-27 14:57Z. 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 20.243, -83.991. 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
2022-04-27 14:57Z
status
Archived notice
authority
SFH 271457Z APR 22.
NAVAREA
NAVAREA IV
issued by
SFH
sea
Caribbean Sea
position
20.243, -83.991
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 271429Z APR:
   A. ARGOS 27-10.4N 090-21.9W.
   B. BLACKFORD DOLPHIN 18-51.3N 093-31.4W.
   C. BLAKE 1007 27-22.0N 094-28.1W.
   D. BLAKE 651 28-23.5N 089-27.2W.
   E. COATZACOALCOS 18-49.8N 091-50.5W.
   F. COSLHUNTER 18-46.0N 093-13.0W.
   G. DEEPWATER ASGARD 27-53.0N 090-40.0W.
   H. DEEPWATER CONQUEROR 27-09.1N 091-12.7W.
   I. (NEW POSITION) DEEPWATER INVICTUS
      27-20.2N 090-09.3W.
   J. DEEPWATER PONTUS 28-11.7N 089-10.7W.
   K. DEEPWATER POSEIDON 26-27.0N 090-47.0W.
   L. DEEPWATER PROTEUS 28-36.0N 088-01.1W.
   M. DEEPWATER THALASSA 09-24.8N 076-45.6W.
   N. DEVELOPMENT DRILLER III 12-27.3N 072-48.8W.
   O. DISCOVERER INSPIRATION 27-45.7N 092-00.5W.
   P. ENSCO 8505 18-59.5N 093-15.9W.
   Q. ENTERPRISE 205 28-35.0N 091-16.8W.
   R. ENTERPRISE 351 29-15.2N 088-45.4W.
   S. FRIDA I 19-36.1N 092-31.7W.
   T. GALAR 18-28.8N 093-27.5W.
   U. GERSEMI 18-29.3N 093-20.7W.
   V. GRID 18-42.7N 093-22.5W.
   W. GSP ATLAS 19-36.0N 090-58.1W.
   X. GSP ORIZONT 19-36.0N 090-58.0W.
   Y. HELIX Q4000 26-09.3N 094-47.4W.
   Z. HELIX Q5000 26-12.6N 091-26.8W.
   AA. HOLSTEIN SPAR 27-19.3N 090-32.1W.
   AB. (NEW RIG) ISLAND VENTURE 27-15.0N 090-02.1W.
   AC. JOE DOUGLAS 19-02.5N 092-26.6W.
   AD. LIZA DESTINY 08-00.0N 057-00.0W.
   AE. LIZA UNITY 08-00.6N 056-54.8W.
   AF. MAD DOG 27-11.3N 090-16.1W.
   AG. MAERSK DEVELOPER 10-21.0N 061-38.1W.
   AH. MAERSK DISCOVERER 10-14.4N 060-08.0W.
   AI. MAERSK VALIANT 07-21.3N 055-51.5W.
   AJ. MODS 200 28-06.1N 090-12.1W.
   AK. NABORS 202 28-47.5N 089-03.4W.
   AL. NJORD 18-28.8N 093-27.6W.
   AM. (NEW POSITION) NOBLE BOB DOUGLAS
       08-15.4N 057-00.5W.
   AN. (NEW POSITION) NOBLE DON TAYLOR
       08-05.9N 056-57.0W.
   AO. NOBLE FAYE KOZACK 26-44.6N 090-29.6W.
   AP. NOBLE GERRY DE SOUZA 07-52.9N 055-44.2W.
   AQ. NOBLE GLOBETROTTER I 28-43.6N 090-18.2W.
   AR. NOBLE GLOBETROTTER II 29-39.2N 088-17.8W.
   AS. NOBLE REGINA ALLEN 10-39.1N 060-37.4W.
   AT. NOBLE SAM CROFT 08-15.2N 056-57.9W.
   AU. NOBLE STANLEY LAFOSSE 27-33.7N 090-06.4W.
   AV. NOBLE TOM MADDEN 07-40.3N 056-36.8W.
   AW. OCEAN BLACKHAWK 28-53.6N 088-06.2W.
   AX. OCEAN BLACKHORNET 28-10.7N 088-27.9W.
   AY. (NEW POSITION) OCEAN BLACKLION
        27-08.7N 090-19.2W.
   AZ. ODIN 18-30.1N 093-31.4W.
   AAA. PAPALOAPAN 18-26.7N 094-08.2W.
   AAB. RALPH COFFMAN 18-20.4N 093-53.6W.
   AAC. ROWAN EXL II 28-06.2N 092-49.3W.
   AAD. ROWAN RELENTLESS 27-09.3N 090-27.9W.
   AAE. SEADRILL WEST VELA 26-39.5N 091-34.8W.
   AAF. SEVAN LOUISIANA 28-52.0N 090-09.1W.
   AAG. SS 198 28-35.1N 091-15.3W.
   AAH. SS 266 28-21.4N 091-05.3W.
   AAI. STENA CARRON 07-56.3N 056-39.9W.
   AAJ. STENA DRILLMAX 07-47.8N 056-51.0W.
   AAK. WELL SERVICES RIG 110 10-15.7N 061-58.6W.
   AAL. WEST COURAGEOUS 19-33.8N 092-16.2W.
   AAM. WEST INTREPID 19-35.4N 092-13.2W.
   AAN. (NEW POSITION) WEST NEPTUNE
        28-10.1N 088-47.4W.
   AAO. WFD 250 29-07.8N 094-32.8W.
   AAP. WFD 300 28-13.7N 092-31.8W.
   AAQ. 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 381/22.

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

113 within 180 nm since 2021 · 6 in the last 12 months · 1 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

Worldwide in the collected sources

56 survey operations listed in force · see all

Record snapshot 2026-10-04 00:08Z; 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.