Surveys

NAVAREA IV mobile offshore drilling units positions at 011250Z feb: a. argos 27-10.4N 090-21.9W

Caribbean Sea · NAVAREA IV 124/23

What this record establishes

Archived notice · 2023-02-15 20:09Z

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 0/23 011258Z FEB 23.. Issued 2023-02-01 17:44Z. 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 21.147, -83.965. 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
2023-02-01 17:44Z
status
Archived notice
authority
SFH 0/23 011258Z FEB 23.
NAVAREA
NAVAREA IV
issued by
SFH
sea
Caribbean Sea
position
21.147, -83.965
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 011250Z FEB:
   A. ARGOS 27-10.4N 090-21.9W.
   B. BLACKFORD DOLPHIN 18-54.9N 093-21.8W.
   C. BLAKE 1007 27-22.0N 094-28.1W.
   D. COATZACOALCOS 18-49.8N 091-50.5W.
   E. COSLHUNTER 19-15.9N 092-26.2W.
   F. DEEPWATER ASGARD 27-48.0N 089-38.9W.
   G. DEEPWATER ATLAS 26-54.2N 091-35.4W.
   H. DEEPWATER CONQUEROR 27-09.5N 091-11.9W.
   I. DEEPWATER INVICTUS 27-21.9N 090-10.2W.
   J. DEEPWATER PONTUS 26-06.9N 094-53.2W.
   K. DEEPWATER PROTEUS 27-48.3N 090-38.9W.
   L. DEEPWATER THALASSA 26-27.5N 090-46.5W.
   M. DEVELOPMENT DRILLER III 11-33.1N 073-34.5W.
   N. DISCOVERER INSPIRATION 27-49.5N 092-39.4W.
   O. ENTERPRISE 264 29-11.5N 088-57.0W.
   P. ENTERPRISE 351 29-28.6N 088-40.6W.
   Q. FRIDA I 19-36.1N 092-31.7W.
   R. GALAR 18-30.5N 093-26.5W.
   S. GERSEMI 18-29.1N 093-21.6W.
   T. GRID 18-26.7N 094-08.2W.
   U. GSP ORIZONT 19-36.0N 090-58.0W.
   V. H&P RIG 100 28-56.8N 088-35.3W.
   W. H&P RIG 201 28-09.5N 089-12.7W.
   X. H&P RIG 205 26-09.4N 094-56.1W.
   Y. H&P RIG 406 27-33.8N 092-25.0W.
   Z. (NEW POSITION) HELIX Q4000
      27-40.1N 090-15.5W.
   AA. HELIX Q5000 28-01.4N 089-09.8W.
   AB. JOE DOUGLAS 18-52.9N 091-45.7W.
   AC. LIZA DESTINY 08-00.0N 057-00.0W.
   AD. LIZA UNITY 08-00.5N 056-54.8W.
   AE. MAD DOG 27-11.3N 090-16.1W.
   AF. MAERSK DISCOVERER 10-38.9N 060-14.1W.
   AG. MAERSK VALIANT 07-19.4N 055-52.6W.
   AH. NABORS MODS 140 28-12.4N 088-46.4W.
   AI. NABORS MODS 200 28-06.2N 090-12.1W.
   AJ. NABORS MODS 400 26-55.8N 090-31.2W.
   AK. NJORD 18-28.8N 093-27.6W.
   AL. NOBLE BOB DOUGLAS 08-11.0N 056-54.9W.
   AM. NOBLE DON TAYLOR 08-07.3N 056-59.7W.
   AN. NOBLE FAYE KOZACK 27-59.4N 088-46.1W.
   AO. NOBLE GERRY DE SOUZA 10-39.0N 061-39.0W.
   AP. NOBLE GLOBETROTTER II 28-09.2N 089-27.6W.
   AQ. NOBLE REGINA ALLEN 10-39.1N 061-37.4W.
   AR. NOBLE SAM CROFT 08-11.0N 056-54.9W.
   AS. NOBLE STANLEY LAFOSSE 27-32.2N 090-10.0W.
   AT. NOBLE TOM MADDEN 08-13.5N 056-58.4W.
   AU. OCEAN BLACKLION 27-08.8N 090-16.3W.
   AV. ODIN 18-30.1N 093-31.4W.
   AW. OLYMPUS N88 28-09.6N 089-12.8W.
   AX. PAPALOAPAN 18-26.7N 094-08.2W.
   AY. RALPH COFFMAN 18-20.4N 093-53.6W.
   AZ. ROWAN EXL II 28-22.0N 091-27.7W.
   AAA. ROWAN RELENTLESS 26-17.3N 091-04.1W.
   AAB. SAIPEM SANTORINI 28-15.1N 088-46.5W.
   AAC. (NEW POSITION) SEADRILL WEST VELA
        28-11.1N 089-24.3W.
   AAD. (NEW RIG) SEVAN BRASIL 12-04.3N 068-51.9W.
   AAE. SEVAN LOUISIANA 28-51.5N 090-06.6W.
   AAF. STENA CARRON 08-04.5N 057-01.1W.
   AAG. STENA DRILLMAX 08-46.4N 057-33.7W.
   AAH. THUNDERHORSE PDQ 28-12.5N 088-28.6W.
   AAI. VALARIS DS-16 28-54.5N 088-11.6W.
   AAJ. (NEW POSITION) WELL SERVICES RIG 110
        10-10.5N 061-45.4W.
   AAK. WELL SERVICES RIG 50 10-13.0N 061-49.8W.
   AAL. WEST AURIGA 27-12.9N 090-03.1W.
   AAM. WEST COURAGEOUS 19-43.1N 092-20.0W.
   AAN. (NEW RIG) WEST DEFENDER 18-25.5N 094-15.4W.
   AAO. WEST INTREPID 19-35.4N 092-13.2W.
   AAP. WEST NEPTUNE 28-04.7N 089-59.0W.
   AAQ. WFD 250 28-58.3N 090-26.8W.
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 106/23.

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

143 within 180 nm since 2016 · 5 in the last 12 months · 1 listed in force now

16
20
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

54 survey operations listed in force · see all

Record snapshot 2026-09-29 13:26Z; 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.