Other

Hydrographic operations in progress until further notice by M/V alliance along trackline joining 39-32N…

Ionian Sea · HYDROLANT 377/99

What this record establishes

Archived notice · 1999-02-23 16:20Z

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). Issued 1999-02-22 08:10Z. 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
Ionian Sea. The map shows the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.

Related notices and cancellation links

Current notices and reporting history in the Ionian Sea →

issued
1999-02-22 08:10Z
status
Archived notice
sea
Ionian Sea
position
39.809, 17.340
vessel
M/V ALLIANCE · 61 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. HYDROGRAPHIC OPERATIONS IN PROGRESS UNTIL FURTHER
   NOTICE BY M/V ALLIANCE ALONG TRACKLINE JOINING
   39-32N 018-00E, 39-48N 018-07E, 39-41N 017-43E,
   39-59N 017-57E, 39-51N 017-32E, 40-11N 017-47E,
   40-14N 017-41E, 40-04N 017-21E, 40-18N 017-24E,
   40-13N 017-15E, 40-27N 017-00E, 40-16N 016-53E,
   40-06N 017-13E, 40-00N 017-11E, 40-05N 016-45E,
   39-59N 016-45E, 39-55N 016-58E, 39-41N 016-38E,
   39-38N 016-46E, 39-53N 017-20E, 39-28N 017-06E,
   39-25N 017-11E, 39-42N 017-31E, 39-36N 017-37E,
   39-13N 017-10E, 39-02N 017-13E, 39-25N 017-44E.
2. CANCEL HYDROLANT 361/99.

Reading this warning

Until further notice
The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
Track line joining
Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
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 · other warnings

49 within 180 nm since 1998 · 0 in the last 12 months · 0 listed in force now

98
00
05
10
15
20
24

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

21 other warnings listed in force · see all

Record snapshot 2026-10-02 17:50Z; source collection times vary.

Other

Everything the classifier did not place elsewhere. All current other warnings →

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.