South Atlantic Ocean

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

in force
37
last 12 months
75
since 1997
15,948
categories
14

In force now · 37

  1. HYDROLANT 1573/26 · Surveys2026-08-14
    Underwater operations by vessels Comando B and Rosco Banyan in South Atlantic, Brazil at 20-23S 040-10W daily 15-29 August, wide berth requested.
  2. HYDROLANT 1569/26 · Missiles2026-08-14
    A space debris hazard zone is in effect off Brazil in the South Atlantic from 18 Aug to 28 Aug, cancelled 28 Aug 22:30 UTC.
  3. HYDROLANT 1566/26 · Surveys2026-08-13
    Underwater operations by vessels Comando B and Faneromeni in South Atlantic off Brazil at 20-23.67S 040-09.45W, 12-21 August daily 1100Z-2100Z, wide berth requested.
  4. HYDROLANT 1565/26 · Surveys2026-08-13
    Underwater operations by vessels Comando B and AM Kirti occur daily from 13 to 22 August at 20-23.90S 040-09.67W; wide berth requested.
  5. HYDROLANT 1560/26 · Surveys2026-08-13
    Underwater operations are in progress off Brazil until 27 August by vessels Navios Felix and Comando B at 20-22.12S 040-08.38W; wide berth requested.
  6. HYDROLANT 1544/26 · Surveys2026-08-10
    Underwater operations by vessels Comando B and Faneromeni occur daily 0800Z to 1800Z from 11 to 25 August at 20-23S 040-09W, wide berth requested.
  7. HYDROLANT 1541/26 · Surveys2026-08-09
    Survey operations by tug MCE Navegacao I in South Atlantic off Brazil from 10 August 2026 to 8 March 2027. Wide berth requested.
  8. HYDROLANT 1529/26 · Surveys2026-08-08
    Survey operations are in progress until 09 July 2027 by vessel BGP Dragon towing a 250-meter cable near Brazil; wide berth requested.
  9. HYDROLANT 1523/26 · Surveys2026-08-07
    Underwater operations by motor vessels Marsanne and Comando B in South Atlantic off Brazil at 20-23.57S 040-08.87W, daily Aug 8-22, wide berth requested, canceled Aug 26.
  10. HYDROLANT 1497/26 · Cable ops2026-08-04
    Survey operations by cableship Nautilus are in progress near Angola until 22 August; wide berth requested.
  11. HYDROLANT 1462/26 · Exercises2026-07-29
    Hazardous operations are occurring off Brazil in a bounded area from August 3 through September 11.
  12. 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.
  13. HYDROLANT 1407/26 · Nav aids2026-07-22
    The radiobeacon at Chui Light, Brazil, is off air until 17 Jan 27.
  14. HYDROLANT 1294/26 · Surveys2026-07-03
    Survey operations are underway by vessel Ramform Victory towing 12 cables three miles long in the South Atlantic off Angola; a five-mile berth is requested.
  15. 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.
  16. 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.
  17. 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.
  18. HYDROLANT 1021/26 · Surveys2026-05-27
    Survey operations continue until August 31, 2200 UTC in the South Atlantic off Brazil; wide berth requested.
  19. 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.
  20. 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.
  21. 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.
  22. HYDROLANT 900/26 · Nav aids2026-05-07
    Tamandare Light in Brazil is unlit until November 2.
  23. 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.
  24. 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.
  25. 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.
  26. HYDROLANT 657/26 · Nav aids2026-04-02
    Radar beacon at Cabo Sao Tome light is off air until 28 Sep.
  27. 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.
  28. 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.
  29. HYDROLANT 627/26 · Nav aids2026-03-30
    Light at Laje da Conceicao, 24-14.18S 046-41.46W, is unlit until 24 September.
  30. HYDROLANT 582/26 · Wrecks2026-03-23
    Foul ground exists in a bounded area off Brazil until December 6, 2027.
  31. HYDROLANT 492/26 · Nav aids2026-03-13
    Barra de Itabapoana light is unlit until 08 September 2026; previous warnings cancelled.
  32. HYDROLANT 453/26 · Nav aids2026-03-07
    Caete Light at 00-49S 046-36W is destroyed; message cancels on September 3, 2026.
  33. 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.
  34. 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.
  35. 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.
  36. HYDROLANT 1213/25 · Wrecks2025-07-19
    Depths are less than charted in three areas off Brazil in the South Atlantic.
  37. 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%
Icebergs3,04819%
Surveys2,29914%
Nav aids1,96012%
Exercises1,95112%
Other6004%
Derelicts4703%
Missiles1971%
Wrecks1341%
Debris490%
Containers380%
Piracy130%
Towing120%
Mines50%

Archive · 15,911 cancelled

  1. HYDROLANT 606/17 · Surveys2017-02-23 → 2017-02-25
    Survey operations by M/V polarcus alima towing 12 8100 meter long cables along tracklines between: a. 23 feb…
  2. HYDROLANT 605/17 · Surveys2017-02-23 → 2017-03-05
    Survey operations in progress until 04 mar by M/V bgp challenger towing 12000 meter long cable in area bound…
  3. HYDROLANT 603/17 · Surveys2017-02-22 → 2017-03-05
    Survey operations in progress until 04 mar by M/V polarcus adira towing 9000 meter long cable in area bound…
  4. HYDROLANT 586/17 · Nav aids2017-02-21 → 2017-02-22
    Ilha rasa light 23-03.8S 043-08.8W unreliable until 19 aug
  5. HYDROLANT 575/17 · Nav aids2017-02-20 → 2017-03-05
    Santo alberto light 05-03.2S 036-02.3W unlit until 18 aug
  6. HYDROLANT 574/17 · Surveys2017-02-19 → 2017-02-22
    Survey operations in progress until 21 feb by M/V polarcus alima towing 12 8100 meter long cables along…
  7. HYDROLANT 562/17 · Surveys2017-02-18 → 2017-02-19
    Survey operations by M/V polarcus alima towing 12 8100 meter long cables along tracklines between: a. 18 feb…
  8. HYDROLANT 549/17 · Surveys2017-02-17 → 2017-02-20
    Survey operations by M/V polarcus alima towing 12 8100 meter long cables: a. 17 feb along trackline between…
  9. HYDROLANT 548/17 · Exercises2017-02-17 → 2017-02-22
    Hazardous operations 221000Z to 221400Z feb in area within 20 miles of 23-23S 042-06W
  10. HYDROLANT 542/17 · Surveys2017-02-17 → 2017-02-19
    Survey operations in progress until 18 feb by M/V polarcus alima towing 12 8100 meter long cables along…
  11. HYDROLANT 534/17 · Exercises2017-02-16 → 2017-02-22
    Hazardous operations 212000Z to 220400Z feb in area bound by 24-00S 042-29W, 24-16S 042-02W, 24-33S 042-12W,…
  12. HYDROLANT 533/17 · Surveys2017-02-16 → 2017-03-10
    Underwater operations 1000Z to 2000Z daily 16 feb thru 10 mar by M/V cape matilde in 20-22.78S 040-08.63W
  13. HYDROLANT 527/17 · Surveys2017-02-15 → 2017-02-23
    Survey operations in progress until 23 feb by M/V bgp challenger towing 10000 meter long cable in area bound…
  14. HYDROLANT 516/17 · Exercises2017-02-15 → 2017-02-20
    Hazardous operations 201500Z to 201900Z feb in area within 20 miles of 24-23S 045-40W
  15. HYDROLANT 515/17 · Derelicts2017-02-15 → 2017-02-18
    Derelict riser float adrift in 22-20.4S 040-04.5W at 142121Z feb
  16. HYDROLANT 512/17 · Surveys2017-02-14 → 2017-02-22
    Survey operations 15 thru 21 feb by M/V polarcus adira towing 9000 meter long cable in area bound by 25-22S…
  17. HYDROLANT 511/17 · Surveys2017-02-14 → 2017-02-22
    Survey operations in progress until 21 feb by M/V oceanic champion towing 12 7400 meter long cables in area…
  18. HYDROLANT 508/17 · Surveys2017-02-14 → 2017-02-17
    Survey operations by M/V polarcus alima towing 12 8100 meter long cables along tracklines between: a. 14 feb…
  19. HYDROLANT 499/17 · Nav aids2017-02-13 → 2017-02-14
    Fort santa cruz light 22-56.3S 043-08.1W unlit until 12 aug
  20. HYDROLANT 498/17 · Surveys2017-02-13 → 2017-02-18
    Survey operations in progress until 17 feb by M/V piaui XV towing 10000 meter long cable in area bound by…

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