Surveys

NAVAREA IV mobile offshore drilling units positions at 071535Z sep: a. argos 27-10.4N 090-21.9W

Gulf of Mexico · NAVAREA IV 1038/23

What this record establishes

Archived notice · 2023-09-20 15:40Z

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 071602Z SEP 23.. Issued 2023-09-07 20:27Z. 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
Gulf of Mexico. The parsed report position is 23.245, -84.034. 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 Gulf of Mexico →

issued
2023-09-07 20:27Z
status
Archived notice
authority
SFH 0/23 071602Z SEP 23.
NAVAREA
NAVAREA IV
issued by
SFH
sea
Gulf of Mexico
position
23.245, -84.034
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 071535Z SEP:
   A. ARGOS 27-10.4N 090-21.9W.
   B. BLAKE 1007 27-22.0N 094-28.1W.
   C. BORR RAN 19-02.6N 092-26.6W.
   D. COATZACOALCOS 19-28.9N 091-57.0W.
   E. DEEPWATER ASGARD 28-14.9N 088-52.4W.
   F. DEEPWATER ATLAS 26-54.1N 091-35.5W.
   G. DEEPWATER CONQUEROR 28-23.3N 088-11.0W.
   H. DEEPWATER INVICTUS 28-50.4N 090-07.4W.
   I. DEEPWATER PONTUS 28-01.7N 089-09.7W.
   J. DEEPWATER POSEIDON 26-35.6N 091-18.4W.
   K. DEEPWATER PROTEUS 28-36.3N 088-02.3W.
   L. DEEPWATER THALASSA 26-09.5N 094-47.3W.
   M. DEEPWATER TITAN 28-01.4N 089-18.5W.
   N. DEVELOPMENT DRILLER III 10-37.0N 061-42.0W.
   O. DISCOVERER INSPIRATION 28-51.1N 090-05.8W.
   P. ENTERPRISE 264 29-11.5N 088-57.0W.
   Q. ENTERPRISE 351 28-15.3N 091-26.0W.
   R. FRIDA I 23-36.3N 091-26.4W.
   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 205 26-06.6N 094-53.1W.
   X. (NEW POSITION) HELIX Q4000
      27-16.0N 090-48.3W.
   Y. (NEW POSITION) HELIX Q5000
      28-23.2N 089-13.1W.
   Z. HOLSTEIN SPAR 27-19.6N 090-31.0W.
   AA. JOE DOUGLAS 10-22.0N 060-36.2W.
   AB. LIZA DESTINY 08-00.6N 056-59.5W.
   AC. LIZA UNITY 08-00.5N 056-54.8W.
   AD. MAD DOG 27-11.3N 090-16.4W.
   AE. MSV OCEAN EVOLUTION 28-00.7N 089-10.3W.
   AF. NABORS MODS 140 28-12.4N 088-46.4W.
   AG. NABORS MODS 200 28-06.2N 090-12.1W.
   AH. NABORS MODS 400 26-55.7N 090-31.4W.
   AI. (NEW POSITION) NOBLE BOB DOUGLAS
       08-14.7N 057-00.1W.
   AJ. NOBLE DISCOVERER 07-22.9N 055-47.2W.
   AK. NOBLE DON TAYLOR 07-54.7N 056-42.3W.
   AL. NOBLE FAYE KOZACK 26-11.4N 092-07.9W.
   AM. NOBLE GLOBETROTTER I 20-11.6N 094-09.5W.
   AN. NOBLE GLOBETROTTER II 26-17.5N 094-24.2W.
   AO. (NEW POSITION) NOBLE SAM CROFT
       07-59.5N 056-42.3W.
   AP. NOBLE STANLEY LAFOSSE 28-52.1N 087-50.7W.
   AQ. (NEW POSITION) NOBLE TOM MADDEN
       08-00.1N 056-42.7W.
   AR. NOBLE VALIANT 26-02.1N 091-59.4W.
   AS. NOBLE VOYAGER 09-20.6N 076-50.1W.
   AT. OCEAN BLACKHORNET 28-09.9N 088-28.6W.
   AU. OCEAN BLACKLION 27-29.2N 089-58.4W.
   AV. ODIN 18-18.3N 094-05.3W.
   AW. OLYMPUS N88 28-09.6N 089-12.8W.
   AX. PAPALOAPAN 19-29.0N 092-01.6W.
   AY. PROSPERITY 08-11.5N 057-00.0W.
   AZ. RALPH COFFMAN 18-20.4N 093-53.6W.
   AAA. ROWAN EXL II 29-03.3N 091-27.7W.
   AAB. ROWAN RELENTLESS 26-12.4N 091-27.5W.
   AAC. SAIPEM SANTORINI 28-12.3N 088-46.5W.
   AAD. SEVAN LOUISIANA 27-53.8N 089-00.9W.
   AAE. STENA CARRON 08-04.5N 057-01.5W.
   AAF. (NEW POSITION) STENA DRILLMAX
        08-10.9N 056-54.9W.
   AAG. THUNDERHORSE PDQ 28-11.4N 088-29.7W.
   AAH. VALARIS 249 10-14.8N 060-30.9W.
   AAI. VALARIS DPS-5 28-52.1N 088-02.5W.
   AAJ. VALARIS DS-16 27-24.5N 090-13.1W.
   AAK. WELL SERVICES RIG 110 10-10.5N 061-45.4W.
   AAL. WELL SERVICES RIG 50 10-40.6N 061-38.7W.
   AAM. WEST AURIGA 27-13.7N 090-01.9W.
   AAN. WEST COURAGEOUS 19-35.1N 092-13.7W.
   AAO. WEST DEFENDER 18-40.4N 092-52.4W.
   AAP. WEST INTREPID 19-36.5N 092-15.5W.
   AAQ. WEST NEPTUNE 26-36.0N 094-33.5W.
   AAR. WEST VELA 27-01.5N 091-00.4W.
   AAS. WFD 250 28-56.7N 090-22.0W.
   AAT. WFD 400 28-12.9N 091-49.5W.
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 1004/23.

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

135 within 180 nm since 2002 · 4 in the last 12 months · 1 listed in force now

02
05
10
15
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

No other collected notice is currently listed in force within this radius. This does not establish safe conditions.

Worldwide in the collected sources

50 survey operations listed in force · see all

Record snapshot 2026-09-25 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.