Surveys
Underwater operations 150600Z to 171800Z may by M/V tethys II in area between 43-20N 43-27N and 007-49E…
HYDROLANT 977/99
- issued
- 1999-05-14 16:39Z
- status
- cancelled 1999-05-17 19:00Z (archive)
- self-cancels
- 1999-05-17 19:00Z
- authority
- NAVAREA II 186/99 AOR-E EGC 163/99
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER OPERATIONS 150600Z TO 171800Z MAY BY M/V TETHYS II IN AREA BETWEEN 43-20N 43-27N AND 007-49E 007-57E. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 171900Z MAY.
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 1999-05-15 06:00Z | 1999-05-17 18:00Z | — | 60 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
Nearby now · within 120 nm
Nothing else in force within 120 nm.
Worldwide now
84 survey operations in force · see all
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.