Surveys

NAVAREA IV mobile offshore drilling units positions at 050315Z may: a. argos 27-10.4N 090-21.9W

Caribbean Sea · NAVAREA IV 497/23

What this record establishes

Archived notice · 2023-05-18 15:26Z

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 031539Z MAY 23.. Issued 2023-05-03 15:47Z. 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 21.071, -83.794. 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
2023-05-03 15:47Z
status
Archived notice
authority
SFH 0/23 031539Z MAY 23.
NAVAREA
NAVAREA IV
issued by
SFH
sea
Caribbean Sea
position
21.071, -83.794
vessel
MSV OCEAN EVOLUTION · 36 messages
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 050315Z MAY:
   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 27-48.5N 089-38.8W.
   G. DEEPWATER ATLAS 26-54.2N 091-35.4W.
   H. DEEPWATER CONQUEROR 29-10.3N 087-47.8W.
   I. DEEPWATER INVICTUS 27-44.5N 092-45.5W.
   J. DEEPWATER PONTUS 28-01.6N 089-09.8W.
   K. DEEPWATER POSEIDON 27-02.1N 092-13.4W.
   L. DEEPWATER PROTEUS 28-01.8N 089-03.6W.
   M. DEEPWATER THALASSA 26-12.2N 094-44.6W.
   N. DEVELOPMENT DRILLER III 07-13.5N 055-51.3W.
   O. DISCOVERER INSPIRATION 27-45.7N 092-00.4W.
   P. ENTERPRISE 264 29-11.5N 088-57.0W.
   Q. ENTERPRISE 351 29-27.7N 088-39.0W.
   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 Q5000 28-09.5N 089-06.9W.
   AB. HOLSTEIN SPAR 27-19.6N 090-31.0W.
   AC. ISLAND PERFORMER 28-11.9N 089-15.9W.
   AD. (NEW POSITION) ISLAND VENTURE
       28-28.4N 088-05.2W.
   AE. (NEW POSITION) JOE DOUGLAS
       10-02.4N 060-15.0W.
   AF. LIZA DESTINY 08-00.0N 057-00.0W.
   AG. LIZA UNITY 08-00.5N 056-54.8W.
   AH. MAD DOG 27-11.3N 090-16.4W.
   AI. MAERSK DISCOVERER 10-38.9N 060-14.1W.
   AJ. MAERSK VALIANT 07-19.4N 055-52.6W.
   AK. (NEW POSITION) MSV OCEAN EVOLUTION
       28-00.7N 089-10.3W.
   AL. NABORS MODS 140 28-12.4N 088-46.4W.
   AM. NABORS MODS 200 28-06.2N 090-12.1W.
   AN. NABORS MODS 400 26-55.8N 090-31.2W.
   AO. NJORD 18-28.8N 093-27.6W.
   AP. NOBLE BOB DOUGLAS 08-04.1N 056-58.9W.
   AQ. NOBLE DON TAYLOR 08-13.5N 057-05.0W.
   AR. NOBLE FAYE KOZACK 27-56.2N 090-00.6W.
   AS. NOBLE GERRY DE SOUZA 10-39.0N 061-39.0W.
   AT. (NEW POSITION) NOBLE GLOBETROTTER II
       26-09.5N 094-47.2W.
   AU. NOBLE REGINA ALLEN 10-39.1N 061-37.4W.
   AV. NOBLE SAM CROFT 08-15.1N 056-56.8W.
   AW. (NEW POSITION) NOBLE STANLEY LAFOSSE
       26-32.4N 090-31.7W.
   AX. NOBLE TOM MADDEN 08-05.9N 056-55.6W.
   AY. OCEAN BLACKHORNET 28-28.5N 088-11.0W.
   AZ. OCEAN BLACKLION 27-06.4N 090-22.1W.
   AAA. ODIN 18-30.1N 093-31.4W.
   AAB. OLYMPUS N88 28-09.6N 089-12.8W.
   AAC. PAPALOAPAN 18-26.7N 094-08.2W.
   AAD. PROSPERITY 08-11.5N 057-00.0W.
   AAE. RALPH COFFMAN 18-20.4N 093-53.6W.
   AAF. ROWAN EXL II 28-22.0N 091-27.7W.
   AAG. ROWAN RELENTLESS 26-56.2N 090-46.0W.
   AAH. SAIPEM SANTORINI 28-27.8N 089-04.3W.
   AAI. SEADRILL WEST VELA 28-11.1N 089-24.3W.
   AAJ. (NEW POSITION) SEVAN LOUISIANA
        27-56.4N 090-53.4W.
   AAK. STENA CARRON 08-04.5N 057-01.5W.
   AAL. STENA DRILLMAX 07-57.4N 056-41.0W.
   AAM. THUNDERHORSE PDQ 28-11.5N 088-29.7W.
   AAN. VALARIS DPS-5 18-48.5N 094-28.5W.
   AAO. VALARIS DS-16 28-54.5N 088-11.6W.
   AAP. WELL SERVICES RIG 110 10-10.5N 061-45.4W.
   AAQ. WELL SERVICES RIG 50 10-13.7N 061-45.5W.
   AAR. WEST AURIGA 27-13.5N 090-00.8W.
   AAS. (NEW POSITION) WEST COURAGEOUS
        19-35.1N 092-13.7W.
   AAT. WEST DEFENDER 18-25.5N 094-15.4W.
   AAU. WEST INTREPID 19-35.4N 092-13.2W.
   AAV. (NEW POSITION) WEST NEPTUNE
        28-10.3N 088-46.4W.
   AAW. WFD 250 28-37.6N 090-14.0W.
   AAX. (NEW RIG) WFD 400 27-57.7N 093-38.7W.
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 466/23.

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 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

55 survey operations listed in force · see all

Record snapshot 2026-09-28 02:36Z; 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.