South Atlantic Ocean

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

in force
37
last 12 months
69
since 1997
15,942
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%
Icebergs3,04719%
Surveys2,29514%
Nav aids1,96012%
Exercises1,95112%
Other5994%
Derelicts4703%
Missiles1971%
Wrecks1341%
Debris490%
Containers380%
Piracy130%
Towing120%
Mines50%

Archive · 15,905 cancelled

  1. HYDROLANT 827/19 · Nav aids2019-03-15 → 2019-04-12
    Ponta do aracagi light 02-27.0S 044-08.9W unreliable until 10 sep 19
  2. HYDROLANT 824/19 · Surveys2019-03-14 → 2019-03-21
    Survey operations in progress until 21 mar by M/V subsea viking in areas bound by: a. 24-34.75S 042-44.83W,…
  3. HYDROLANT 823/19 · Surveys2019-03-14 → 2019-04-05
    Survey operations in progress until 04 apr by M/V kommandor iona in area bound by 24-50.00S 043-00.00W,…
  4. HYDROLANT 820/19 · Icebergs2019-03-14 → 2019-03-15
    Icebergs reported in: a. B15T, 54-10S 027-43W
  5. HYDROLANT 817/19 · Surveys2019-03-14 → 2019-03-16
    Underwater operations 140259Z to 160259Z mar by M/V nhi sirius in area within five miles 24-36.6S 046-41.0W
  6. HYDROLANT 807/19 · Surveys2019-03-14 → 2019-03-14
    Underwater operations 140259Z to 160259Z mar by M/V nhi sirius in area within two miles of 24-36.6S 046-41.0W
  7. HYDROLANT 806/19 · Surveys2019-03-14 → 2019-03-14
    Underwater operations 140259Z to 160259Z mar by M/V nhi sirius in area within two miles of 24-24S 046-37W
  8. HYDROLANT 800/19 · Icebergs2019-03-13 → 2019-03-14
    Icebergs reported in: a. B15T, 54-12S 027-32W
  9. HYDROLANT 796/19 · Exercises2019-03-13 → 2019-03-18
    Hazardous operations 130900Z to 180900Z mar in areas bound by: a. 25-11.49S 046-49.13W, 25-01.17S…
  10. HYDROLANT 784/19 · Icebergs2019-03-12 → 2019-03-13
    Icebergs reported in: a. B15T, 54-13S 027-24W
  11. HYDROLANT 778/19 · Nav aids2019-03-12 → 2019-07-04
    Paranagua radiobeacon 25-30.0S 048-19.0W off air
  12. HYDROLANT 777/19 · Nav aids2019-03-12 → 2019-04-19
    Caraguata light 25-34.4S 048-19.2W unlit
  13. HYDROLANT 774/19 · Icebergs2019-03-12 → 2019-03-13
    Icebergs reported in: a. B15T, 54-14S 027-16W
  14. HYDROLANT 766/19 · Exercises2019-03-10 → 2019-03-12
    Hazardous operations 110900Z to 160900Z mar in areas bound by: a. 25-11.48S 046-49.13W, 25-01.17S…
  15. HYDROLANT 764/19 · Icebergs2019-03-10 → 2019-03-11
    Icebergs reported in: a. B15T, 54-20S 027-08W
  16. HYDROLANT 762/19 · Derelicts2019-03-10 → 2019-03-12
    Derelict vessel dengo I adrift in 20-23.25S 039-59.27W
  17. HYDROLANT 753/19 · Icebergs2019-03-09 → 2019-03-10
    Icebergs reported in: a. B15T, 54-25S 027-27W
  18. HYDROLANT 751/19 · Exercises2019-03-09 → 2019-03-13
    Hazardous operations 100900Z to 130900Z mar in area bound by 25-21.00S 046-26.00W, 25-28.00S 046-38.88W,…
  19. HYDROLANT 748/19 · Debris2019-03-08 → 2019-03-11
    Yellow tailbuoy adrift in vicinity 28-41.4S 014-24.1E
  20. HYDROLANT 745/19 · Icebergs2019-03-08 → 2019-03-09
    Icebergs reported in: a. B15T, 54-25S 027-27W

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