Surveys

NAVAREA IV mobile offshore drilling units positions at 021230Z mar: a. argos 27-10.4N 090-21.9W

Caribbean Sea · NAVAREA IV 227/23

What this record establishes

Archived notice · 2023-03-16 17:14Z

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 021233Z MAR 23.. Issued 2023-03-02 12:42Z. 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 21.191, -83.693. 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
2023-03-02 12:42Z
status
Archived notice
authority
SFH 0/23 021233Z MAR 23.
NAVAREA
NAVAREA IV
issued by
SFH
sea
Caribbean Sea
position
21.191, -83.693
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 021230Z MAR:
   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 27-22.2N 090-08.7W.
   J. (NEW POSITION) DEEPWATER PONTUS
      26-06.3N 094-54.4W.
   K. DEEPWATER POSEIDON 27-02.1N 092-13.4W.
   L. DEEPWATER PROTEUS 27-48.3N 090-38.9W.
   M. DEEPWATER THALASSA 26-27.5N 090-46.5W.
   N. DEVELOPMENT DRILLER III 11-33.1N 073-34.5W.
   O. DISCOVERER INSPIRATION 27-45.7N 092-00.4W.
   P. ENTERPRISE 264 29-11.5N 088-57.0W.
   Q. ENTERPRISE 351 29-28.6N 088-40.6W.
   R. FRIDA I 19-36.1N 092-31.7W.
   S. GALAR 18-30.5N 093-26.5W.
   T. GERSEMI 18-29.1N 093-21.6W.
   U. GRID 18-26.7N 094-08.2W.
   V. GSP ORIZONT 19-36.0N 090-58.0W.
   W. H&P RIG 100 28-56.8N 088-35.3W.
   X. H&P RIG 201 28-09.5N 089-12.7W.
   Y. H&P RIG 205 26-06.6N 094-53.1W.
   Z. H&P RIG 406 27-33.8N 092-25.0W.
   AA. HELIX Q4000 27-42.7N 090-15.6W.
   AB. HOLSTEIN SPAR 27-19.6N 090-31.0W.
   AC. ISLAND VENTURE 28-10.0N 088-28.7W.
   AD. JOE DOUGLAS 09-60.0N 060-31.9W.
   AE. LIZA DESTINY 08-00.0N 057-00.0W.
   AF. LIZA UNITY 08-00.5N 056-54.8W.
   AG. MAD DOG 27-11.3N 090-16.4W.
   AH. MAERSK DISCOVERER 10-38.9N 060-14.1W.
   AI. MAERSK VALIANT 07-19.4N 055-52.6W.
   AJ. NABORS MODS 140 28-12.4N 088-46.4W.
   AK. NABORS MODS 200 28-06.2N 090-12.1W.
   AL. NABORS MODS 400 26-55.8N 090-31.2W.
   AM. NJORD 18-28.8N 093-27.6W.
   AN. NOBLE BOB DOUGLAS 08-10.3N 056-55.3W.
   AO. NOBLE DON TAYLOR 07-55.8N 056-42.1W.
   AP. NOBLE FAYE KOZACK 27-59.4N 088-46.1W.
   AQ. NOBLE GERRY DE SOUZA 10-39.0N 061-39.0W.
   AR. NOBLE GLOBETROTTER II 28-20.6N 087-56.2W.
   AS. NOBLE REGINA ALLEN 10-39.1N 061-37.4W.
   AT. NOBLE SAM CROFT 08-14.7N 057-01.2W.
   AU. NOBLE STANLEY LAFOSSE 27-32.2N 090-10.0W.
   AV. NOBLE TOM MADDEN 08-13.5N 056-58.4W.
   AW. (NEW POSITION) OCEAN BLACKHORNET
       28-28.4N 088-11.2W.
   AX. OCEAN BLACKLION 27-08.8N 090-16.3W.
   AY. ODIN 18-30.1N 093-31.4W.
   AZ. OLYMPUS N88 28-09.6N 089-12.8W.
   AAA. PAPALOAPAN 18-26.7N 094-08.2W.
   AAB. RALPH COFFMAN 18-20.4N 093-53.6W.
   AAC. ROWAN EXL II 28-22.0N 091-27.7W.
   AAD. SAIPEM SANTORINI 28-15.1N 088-46.5W.
   AAE. SEADRILL WEST VELA 28-11.1N 089-24.3W.
   AAF. SEVAN BRASIL 12-04.3N 068-51.9W.
   AAG. SEVAN LOUISIANA 27-56.4N 090-53.5W.
   AAH. STENA CARRON 08-04.5N 057-01.5W.
   AAI. STENA DRILLMAX 08-46.4N 057-33.7W.
   AAJ. THUNDERHORSE PDQ 28-12.5N 088-28.6W.
   AAK. VALARIS DS-16 28-54.5N 088-11.6W.
   AAL. WELL SERVICES RIG 110 10-10.5N 061-45.4W.
   AAM. WELL SERVICES RIG 50 10-13.7N 061-45.5W.
   AAN. WEST AURIGA 27-13.5N 090-00.8W.
   AAO. WEST COURAGEOUS 19-43.1N 092-20.0W.
   AAP. WEST DEFENDER 18-25.5N 094-15.4W.
   AAQ. WEST INTREPID 19-35.4N 092-13.2W.
   AAR. WEST NEPTUNE 26-14.5N 092-22.7W.
   AAS. 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 203/23.

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

151 within 180 nm since 2017 · 5 in the last 12 months · 1 listed in force now

17
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

56 survey operations listed in force · see all

Record snapshot 2026-10-01 18:43Z; 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.