Surveys

Survey operations by M/V polarcus alima towing 12 8100 meter long cables: a. 09 apr along trackline joining…

Western South Atlantic · HYDROLANT 1146/17

issued: 2017-04-09 14:53Z
status: cancelled 2017-04-12 00:01Z (archive)
cancels: HYDROLANT 1138/17
authority: NAVAREA VI 232/17 091444Z APR 17.
position: -35.480, -51.290
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
DNC 07.
1. SURVEY OPERATIONS BY M/V POLARCUS ALIMA
   TOWING 12 8100 METER LONG CABLES:
   A. 09 APR ALONG TRACKLINE JOINING
      35-34.95S 051-13.77W, 35-37.48S 051-07.58W,
      35-24.77S 051-27.35W.
   B. 10 APR ALONG TRACKLINE BETWEEN
      35-20.70S 051-26.68W AND 35-33.02S 051-27.68W.
   C. 11 APR ALONG TRACKLINE BETWEEN
      35-18.78S 051-25.08W AND 35-32.68S 051-03.60W.
   SIX MILE BERTH REQUESTED.
2. CANCEL HYDROLANT 1138/17.
3. CANCEL THIS MSG 12 APR 17.

This area · survey operations

117 within 180 nm since 2000 · 0 in the last 12 months · 0 in force now

Season · when survey operations happen here

month of issue, all years in the archive

Timeline

Survey operations by M/V polarcus alima towing 12 8100 meter long cables: a. 08 apr along trackline between…cancels · 2017-04-08
Survey operations by M/V polarcus alima towing 12 8100 meter long cables: a. 08 apr along trackline between…replaced · 2017-04-08
Survey operations 12 apr by M/V polarcus alima towing 12 8100 meter long cables along trackline between…cancelled by · 2017-04-11

Nearby now · within 120 nm

Nothing else in force within 120 nm.

Worldwide now

73 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.