Surveys
Underwater operations 081600Z to 101800Z apr by M/V thetys II in area between 43-20N 43-27N and 007-49E…
HYDROLANT 677/99
- issued
- 1999-04-07 15:15Z
- status
- cancelled 1999-04-10 00:00Z (archive)
- self-cancels
- 1999-04-10 19:00Z
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER OPERATIONS 081600Z TO 101800Z APR BY M/V THETYS II IN AREA BETWEEN 43-20N 43-27N AND 007-49E 007-57E. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 101900Z APR.
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 1999-04-08 16:00Z | 1999-04-10 18:00Z | — | 50 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.