Surveys

Underwater operations 1000Z to 2200Z daily 30 oct to 02 nov by M/V hydros IV in area bound by 22-59.07S…

Western South Atlantic · HYDROLANT 3320/20

issued: 2020-10-30 05:21Z
status: cancelled 2020-10-30 14:59Z (archive)
authority: NAVAREA V 350/20 300008Z OCT 20.
sea: South Atlantic Ocean
position: -22.985, -37.959
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
DNC 01.
1. UNDERWATER OPERATIONS 1000Z TO 2200Z DAILY
   30 OCT TO 02 NOV BY M/V HYDROS IV
   IN AREA BOUND BY
   22-59.07S 037-57.56W, 22-59.07S 037-57.53W,
   22-59.08S 037-57.53W, 22-59.08S 037-57.56W.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 03 NOV 20.

Activity windows · 4 in this warning

opens (UTC)	closes (UTC)	local	length
2020-10-30 10:00Z	2020-10-30 22:00Z	—	12 h
2020-10-31 10:00Z	2020-10-31 22:00Z	—	12 h
2020-11-01 10:00Z	2020-11-01 22:00Z	—	12 h
2020-11-02 10:00Z	2020-11-02 22:00Z	—	12 h

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

This area · survey operations

452 within 180 nm since 2000 · 8 in the last 12 months · 8 in force now

Season · when survey operations happen here

month of issue, all years in the archive

Timeline

Cancel HYDROLANT 3320/20 and this msgcancelled by · 2020-10-30

Nearby now · within 120 nm

Underwater operations in progress until 140001Z nov by M/V fugro vaquita in area bound by 22-03.00S…Surveys · 101.4 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.