Wrecks

Obstruction, 20.7 meters below surface, in 06-15.30N 002-28.96E

Gulf of Guinea · HYDROLANT 1147/15

What this record establishes

Archived notice · 2015-05-20 17:04Z

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 166/15 111635Z MAY 15.. Issued 2015-05-11 18:50Z. 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 parsed report position is 6.255, 2.483. 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

These reports were linked by category and sea, with positions within 30 nautical miles and issue dates within 30 days of another report's recorded in-force span. Links can extend through other members, so the full group can cover a larger area or period. Proximity does not confirm that they describe one incident.

  1. HYDROLANT 1041/152015-04-29 · Archived notice
  2. HYDROLANT 1145/152015-05-11 · Archived notice
  3. HYDROLANT 1147/15 · this notice2015-05-11 · Archived notice
  4. HYDROLANT 1255/152015-05-21 · Archived notice
Compare all 4 notices, changes and original texts →

Current notices and reporting history in the Gulf of Guinea →

issued
2015-05-11 18:50Z
status
Archived notice
authority
NAVAREA II 166/15 111635Z MAY 15.
NAVAREA
NAVAREA II · named as the source of this relay
sea
Gulf of Guinea
position
6.255, 2.483
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

GULF OF GUINEA.
BENIN.
CHART 57103.
DNC 01.
1. OBSTRUCTION, 20.7 METERS BELOW SURFACE, IN 06-15.30N 002-28.96E.
2. CANCEL HYDROLANT 1145/15.

Reading this warning

Chart reference
The number of the nautical chart on which the reported position lies.
DNC (Digital Nautical Chart)
A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
Submerged obstruction
Something on or near the seabed that could damage a ship, an anchor or fishing gear — its nature often unknown.
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.
HYDROLANT
The U.S. long-range warning series for Atlantic waters outside NAVAREA IV, including the eastern Atlantic, the Mediterranean and adjoining seas.

All warning terms →

Collected reports in this area · wrecks & obstructions

13 within 180 nm since 2010 · 0 in the last 12 months · 0 listed in force now

10
15
19

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

38 wrecks & obstructions listed in force · see all

Record snapshot 2026-10-02 07:08Z; source collection times vary.

Wrecks

Dangerous wrecks, shoals and submerged obstructions. All current wrecks & obstructions →

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.