Nga chart 57162 (7TH ed)
Gulf of Guinea · HYDROLANT 897/11
What this record establishes
Archived notice · 2011-05-30 07:30Z
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) · NAVAREA II 161/11 281000Z MAY 11.. Issued 2011-05-28 10:57Z. 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
- Gulf of Guinea. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Cancel HYDROLANT 897/11 and this msg, operations completedlater cancellation notice
Current notices and reporting history in the Gulf of Guinea →
- issued
- 2011-05-28 10:57Z
- status
- Archived notice
- authority
- NAVAREA II 161/11 281000Z MAY 11.
- NAVAREA
- NAVAREA II · named as the source of this relay
- sea
- Gulf of Guinea
- position
- 3.776, 8.773
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
GULF OF GUINEA. NGA CHART 57162 (7TH ED). NAVIGATION PROHIBITED UNTIL FURTHER NOTICE IN AREA BOUND BY 03-45.76N 008-45.05E, 03-47.72N 008-47.22E, 03-47.28N 008-47.58E, 03-45.50N 008-45.58E.
Reading this warning
- Chart reference
- The number of the nautical chart on which the reported position lies.
- Navigation prohibited
- Ships may not enter or pass through the area, or a port is closed to traffic.
- Until further notice
- The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
- Area bound by
- Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
- 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.
Collected reports in this area · restricted areas & port closures
1 within 180 nm since 2011 · 0 in the last 12 months · 0 listed in force now
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
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
- Aids to navigationNav aids · 60.3 nm
- Newly discovered dangersWrecks · 108.8 nm
- Dangerous wreck in 04-18.50N 007-02.20EWrecks · 108.8 nm
Worldwide in the collected sources
2 restricted areas & port closures listed in force · see all
Record snapshot 2026-10-01 17:49Z; source collection times vary.
Restricted
Navigation prohibited, exclusion and security zones, ports closed to traffic. All current restricted areas & port closures →
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.