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 422/15 · Cable ops2015-02-18 → 2015-02-18
    Seismic survey 19 feb until further notice by M/V northern explorer in area bound by 22-40S 011-50E, 22-40S…
  2. HYDROPAC 559/15 · Surveys2015-02-17 → 2015-04-04
    Underwater operations 19 feb thru 03 apr by M/V l atalante along trackline between 19-00S 155-00E and 19-00S…
  3. HYDROLANT 404/15 · Cable ops2015-02-16 → 2015-02-18
    Seismic survey 17 feb thru 04 mar by M/V northern explorer in area bound by 24-33S 012-13E, 22-58S 011-47E,…
  4. HYDROLANT 402/15 · Exercises2015-02-16 → 2015-02-20
    Hazardous operations
  5. HYDROLANT 381/15 · Derelicts2015-02-14 → 2015-04-26
    S/V tunante II dismasted and adrift in area bound by 35-00S 052-00W, 36-00S 050-24W, 36-00S 037-00W, 43-00S…
  6. HYDROLANT 368/15 · Other2015-02-12 → 2015-02-27
    Fishing gear marked by orange buoy abandoned in 26-18.10S 013-45.52E
  7. HYDROLANT 345/15 · Nav aids2015-02-11 → 2015-02-24
    RACON at ararangua light 28-56.1S 049-21.7W inoperative
  8. HYDROLANT 334/15 · Icebergs2015-02-10 → 2015-02-13
    Iceberg B17A, in 55-11S 036-20W
  9. HYDROLANT 328/15 · Nav aids2015-02-09 → 2015-02-13
    Ararangua light 28-56.1S 049-21.7W unlit
  10. HYDROLANT 327/15 · Other2015-02-09 → 2015-05-02
    Platform established in 21-57.63S 039-45.42W
  11. HYDROLANT 314/15 · Derelicts2015-02-07 → 2015-02-07
    Vessel mar leon II disabled and adrift due to engine failure in 25-36S 048-17W at 062257Z feb
  12. HYDROLANT 307/15 · Cable ops2015-02-06 → 2015-02-28
    Seismic survey in progress until further notice by M/V polarcus nadia towing 9260 meter long cables in area…
  13. HYDROLANT 300/15 · Cable ops2015-02-05 → 2015-04-05
    Seismic survey in progress until 04 apr by M/V nps sigma in area bound by 21-01.00S 039-44.08W, 21-11.63S…
  14. HYDROLANT 293/15 · Surveys2015-02-04 → 2015-04-11
    Underwater operations in progress until 10 apr by vessel oceanica II and vessel asso ventisette within 0.5…
  15. HYDROLANT 285/15 · Icebergs2015-02-02 → 2015-02-05
    Iceberg B17A, in 55-11S 036-20W
  16. HYDROLANT 265/15 · Other2015-01-31 → 2015-04-02
    Platform established in 22-05.68S 039-50.87W
  17. HYDROLANT 251/15 · Other2015-01-30 → 2015-01-30
    Platform established in 21-20S 040-02W
  18. HYDROLANT 243/15 · Derelicts2015-01-29 → 2015-02-01
    Derelict vessel adrift in 20-43-30S 040-09-90W at 281226Z jan
  19. HYDROLANT 224/15 · Surveys2015-01-27 → 2015-02-15
    Underwater operations 1000Z to 2000Z daily 29 jan thru 15 feb by M/V nirvana in 19-50S 040-00W
  20. HYDROLANT 223/15 · Surveys2015-01-27 → 2015-02-15
    Underwater operations 1000Z to 2000Z daily in progress until 15 feb by M/V rr europa in 20-20.00S 040-09.33W

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