South Atlantic Ocean

IHO sea area 32 · -70° to 20° E, -60° to 0° N

in force
26
last 12 months
86
since 1997
15,959
categories
14

In force now · 26

  1. HYDROLANT 1462/26 · Exercises2026-07-29
    Hazardous operations are occurring off Brazil in a bounded area from August 3 through September 11.
  2. HYDROLANT 1457/26 · Exercises2026-07-29
    Hazardous operations are in progress in the South Atlantic until 060400Z June 27 near 24-39S 042-30W; two-mile berth requested.
  3. HYDROLANT 1407/26 · Nav aids2026-07-22
    The radiobeacon at Chui Light, Brazil, is off air until 17 Jan 27.
  4. NAVAREA II 269/26 · Cable ops2026-07-02
    Seismic survey by vessel Ramform Victory is in progress off Pointe Noire until further notice; wide berth requested.
  5. HYDROLANT 1258/26 · Nav aids2026-06-27
    An ocean data buoy is temporarily established in the South Atlantic off Brazil at 32-14.29S 051-58.16W, with cancellation December 26.
  6. HYDROLANT 1160/26 · Surveys2026-06-17
    Underwater operations by vessel Fugro Vaquita are in progress until 140001Z November, with wide berth requested; cancels HYDROLANT 1157/26.
  7. HYDROLANT 1021/26 · Surveys2026-05-27
    Survey operations continue until August 31, 2200 UTC in the South Atlantic off Brazil; wide berth requested.
  8. HYDROLANT 985/26 · Surveys2026-05-21
    Underwater operations by vessel Fugro Vaquita continue until August 31st in the South Atlantic off Brazil, wide berth requested.
  9. HYDROLANT 942/26 · Nav aids2026-05-13
    An ocean data acquisition buoy is established at 05-09.46S 035-09.81W in the South Atlantic off Brazil; this message cancels at 080001Z Nov 26.
  10. HYDROLANT 906/26 · Nav aids2026-05-08
    An ODAS buoy Bravo RN-L is temporarily established in the South Atlantic off Brazil at 04-53.00S 035-46.01W until 20 October.
  11. HYDROLANT 900/26 · Nav aids2026-05-07
    Tamandare Light in Brazil is unlit until November 2.
  12. HYDROLANT 882/26 · Nav aids2026-05-04
    Maceio light, 09-41.03S 035-43.38W, is unlit until 31 October; cancellation at 010001Z November 26.
  13. HYDROLANT 810/26 · Nav aids2026-04-23
    A yellow data buoy is established in the South Atlantic off Brazil at 17-58.12S 038-41.48W until October 19; message cancels October 26.
  14. HYDROLANT 809/26 · Nav aids2026-04-23
    An ODAS buoy is temporarily established in the South Atlantic off Brazil at 32-32.46S 052-06.03W until 31 Dec 2027; HYDROLANT 1946/25 canceled.
  15. HYDROLANT 657/26 · Nav aids2026-04-02
    Radar beacon at Cabo Sao Tome light is off air until 28 Sep.
  16. HYDROLANT 638/26 · Nav aids2026-03-31
    Ponta dos Meros light at 23-13.57S 044-20.83W is unlit until 26 September; cancel advisories.
  17. HYDROLANT 628/26 · Nav aids2026-03-30
    An ODAS buoy is established at 24-06.36S 045-38.78W; this message cancels 250001Z September 2026.
  18. HYDROLANT 627/26 · Nav aids2026-03-30
    Light at Laje da Conceicao, 24-14.18S 046-41.46W, is unlit until 24 September.
  19. HYDROLANT 582/26 · Wrecks2026-03-23
    Foul ground exists in a bounded area off Brazil until December 6, 2027.
  20. HYDROLANT 492/26 · Nav aids2026-03-13
    Barra de Itabapoana light is unlit until 08 September 2026; previous warnings cancelled.
  21. HYDROLANT 453/26 · Nav aids2026-03-07
    Caete Light at 00-49S 046-36W is destroyed; message cancels on September 3, 2026.
  22. HYDROLANT 434/26 · Nav aids2026-03-05
    Ponta da Galheta light at 27-34.55S 048-24.99W is unlit until 31 August. Cancellation on 1 September 2026.
  23. HYDROLANT 397/26 · Surveys2026-02-27
    A yellow scientific buoy flashing every 20 seconds is established at 27-24.38S 047-15.92W off Brazil until 25 August.
  24. HYDROLANT 2010/25 · Surveys2025-11-28
    Underwater survey operations by vessel Fugro Vaquita off Brazil daily from 10:00 to 20:00 UTC until November 2, 2026; wide berth requested.
  25. HYDROLANT 1213/25 · Wrecks2025-07-19
    Depths are less than charted in three areas off Brazil in the South Atlantic.
  26. HYDROLANT 915/25 · Wrecks2025-05-31
    A reported depth of 18.3 meters at 20-35.71S 034-46.07W in the Western South Atlantic; previous warning cancelled.

Longest in force

  1. HYDROLANT 915/25 · Wrecks2025-05-31
    A reported depth of 18.3 meters at 20-35.71S 034-46.07W in the Western South Atlantic; previous warning cancelled.
  2. HYDROLANT 1213/25 · Wrecks2025-07-19
    Depths are less than charted in three areas off Brazil in the South Atlantic.
  3. HYDROLANT 2010/25 · Surveys2025-11-28
    Underwater survey operations by vessel Fugro Vaquita off Brazil daily from 10:00 to 20:00 UTC until November 2, 2026; wide berth requested.
  4. HYDROLANT 397/26 · Surveys2026-02-27
    A yellow scientific buoy flashing every 20 seconds is established at 27-24.38S 047-15.92W off Brazil until 25 August.
  5. HYDROLANT 434/26 · Nav aids2026-03-05
    Ponta da Galheta light at 27-34.55S 048-24.99W is unlit until 31 August. Cancellation on 1 September 2026.

By year

97
98
99
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

By month (all years)

J
F
M
A
M
J
J
A
S
O
N
D

By category · since 1997

Cable ops5,17232%
Icebergs3,05119%
Surveys2,30414%
Nav aids1,96212%
Exercises1,95112%
Other6004%
Derelicts4703%
Missiles1971%
Wrecks1351%
Debris490%
Containers380%
Piracy130%
Towing120%
Mines50%

Archive · 15,933 cancelled

  1. HYDROLANT 2075/06 · Cable ops2006-11-16 → 2006-11-25
    Seismic survey in progress until 250259Z nov by M/V ramform valiant towing ten 6000 meter long cables in…
  2. HYDROLANT 2071/06 · Other2006-11-15 → 2006-11-16
    F/V costa neves reports crewman requiring medical assistance in 33-08S 052-04W
  3. HYDROPAC 2207/06 · Icebergs2006-11-15 → 2006-11-21
    Icebergs reported in: a. A-22A, 57-32S 044-01W
  4. HYDROLANT 2069/06 · Icebergs2006-11-15 → 2006-11-21
    Icebergs reported in: a. A-22A, 57-32S 044-01W
  5. HYDROLANT 2057/06 · Cable ops2006-11-12 → 2006-11-16
    Seismic survey in progress until 180259Z nov by M/V ramform valiant towing ten 6000 meter long cables in…
  6. HYDROLANT 2056/06 · Exercises2006-11-12 → 2006-11-18
    Hazardous operations 172000Z to 180600Z nov in area bound by 31-35.5S 050-34.0W, 31-48.0S 050-16.0W,…
  7. HYDROLANT 2048/06 · Cable ops2006-11-10 → 2006-11-12
    Seismic survey in progess until 120259Z nov by M/V ramform valiant towing ten 6000 meter long cables in area…
  8. HYDROLANT 2044/06 · Mines2006-11-09 → 2006-11-14
    Mining operations 141000Z to 142200Z nov in area bound by 23-10.0S 044-05.5W, 23-14.0S 044-12.0W, 23-20.0S…
  9. HYDROLANT 2043/06 · Cable ops2006-11-09 → 2006-11-10
    Seismic survey in progress until 150259Z nov by M/V ramform valiant towing ten 6000 meter long cables in…
  10. HYDROLANT 2042/06 · Debris2006-11-09 → 2006-11-16
    Seismic cable with orange buoy adrift in 22-10S 040-33W at 080700Z nov
  11. HYDROLANT 2038/06 · Other2006-11-08 → 2006-11-13
    Naval control exercise 091900Z to 130300Z nov in area bound by: 31-33.00S 051-14.50W, 32-17.50S 050-07.00W,…
  12. HYDROLANT 2033/06 · Cable ops2006-11-07 → 2006-11-09
    Seismic survey 071300Z to 090400Z nov by M/V ramform valiant towing ten 6000 meter long cables in area bound…
  13. HYDROLANT 2032/06 · Cable ops2006-11-07 → 2006-11-16
    Seismic survey in progress until 180259Z nov by M/V cgg alize towing ten 6000 meter long cables in area…
  14. HYDROLANT 2028/06 · Icebergs2006-11-07 → 2006-11-13
    Icebergs reported in: a. A-22A 57-54S 045-17W
  15. HYDROLANT 2023/06 · Cable ops2006-11-05 → 2006-11-07
    Seismic survey in progress until 070259Z nov by M/V cgg alize towing ten 6000 meter long cables in area…
  16. HYDROLANT 2016/06 · Nav aids2006-11-04 → 2008-02-09
    Radiobeacon at cabo santa maria light 34-40.3S 054-09.1W discontinued
  17. HYDROLANT 2010/06 · Cable ops2006-11-03 → 2006-11-04
    Seismic survey in progress until 040259Z nov by M/V cgg alize towing ten 6000 meter long cables in area…
  18. HYDROLANT 1996/06 · Other2006-11-01 → 2006-11-14
    Exercise of naval control of maritime traffic (cntm) with the purpose of training brazilian organization of…
  19. HYDROLANT 1992/06 · Other2006-11-01 → 2006-12-06
    M/V ore hansa reports wounded crewman in 25-38.7S 048-13.0W at 312135Z oct
  20. HYDROLANT 1985/06 · Cable ops2006-10-30 → 2006-11-02
    Seismic survey in progress until 020259Z nov by M/V ramform valiant towing ten 6000 meter long cables in…

Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.