South Atlantic Ocean

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

in force
26
last 12 months
80
since 1997
15,953
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%
Icebergs3,04919%
Surveys2,30214%
Nav aids1,96112%
Exercises1,95112%
Other6004%
Derelicts4703%
Missiles1971%
Wrecks1341%
Debris490%
Containers380%
Piracy130%
Towing120%
Mines50%

Archive · 15,927 cancelled

  1. HYDROLANT 905/11 · Exercises2011-05-30 → 2011-06-05
    Hazardous operations
  2. HYDROLANT 898/11 · Exercises2011-05-29 → 2011-06-03
    Hazardous operations
  3. HYDROLANT 886/11 · Nav aids2011-05-26 → 2011-06-25
    Nga chart 24270(3RD ed)
  4. HYDROLANT 882/11 · Cable ops2011-05-26 → 2011-05-31
    Seismic survey in progress until 30 may by M/V ramform valiant towing ten 9000 meter long cables in area…
  5. HYDROLANT 879/11 · Surveys2011-05-25 → 2011-07-15
    Survey operations 0900Z to 2100Z daily 25 may thru 15 jul by M/V mar azul and M/V fermisa vicinity 19-33.80S…
  6. HYDROLANT 878/11 · Nav aids2011-05-25 → 2011-05-26
    Nga chart 24190 (15TH ed)
  7. HYDROLANT 877/11 · Cable ops2011-05-25 → 2011-06-01
    Seismic survey in progress until 010259Z jun by M/V geco diamond towing 250 meter long cable in area bound…
  8. HYDROLANT 876/11 · Cable ops2011-05-25 → 2011-06-01
    Seismic survey in progress until 010259Z jun by M/V ramform sovereing towing 14 8100 meter long cables in…
  9. HYDROLANT 875/11 · Cable ops2011-05-25 → 2011-06-01
    Seismic survey in progress until 010259Z jun by M/V western neptune towing 12 3.5 mile long cables in area…
  10. HYDROLANT 874/11 · Cable ops2011-05-25 → 2011-06-01
    Seismic survey in progress until 010259Z jun by M/V western monarch towing three mile long cables in area…
  11. HYDROLANT 865/11 · Cable ops2011-05-22 → 2011-05-26
    Seismic survey in progress until 25 may by M/V ramform valiant towing ten 9000 meter long cables in area…
  12. HYDROLANT 863/11 · Nav aids2011-05-22 → 2011-07-27
    Nga chart 24290 (3RD ed)
  13. HYDROLANT 862/11 · Cable ops2011-05-22 → 2011-05-25
    Seismic survey in progress until 250259Z may by M/V western monarch towing three mile long cables in area…
  14. HYDROLANT 861/11 · Cable ops2011-05-22 → 2011-05-25
    Seismic survey in progress until 250259Z may by M/V western neptune towing 12 3.5 mile long cables in area…
  15. HYDROLANT 858/11 · Cable ops2011-05-21 → 2011-05-25
    Seismic survey in progress until 250259Z may by M/V geco diamond towing 250 meter long cable in area bound…
  16. HYDROLANT 857/11 · Cable ops2011-05-21 → 2011-05-25
    Seismic survey in progress until 250259Z may by M/V ramform sovereing towing 14 8100 meter long cables in…
  17. HYDROLANT 854/11 · Nav aids2011-05-20 → 2011-09-03
    Nga chart 24320 (4TH ed)
  18. HYDROLANT 853/11 · Nav aids2011-05-20 → 2011-07-24
    Nga chart 24290 (3RD ed)
  19. HYDROLANT 852/11 · Cable ops2011-05-20 → 2011-05-31
    Cable laying operations in progress until 05 jun by cableship ile de brehat along trackline joining…
  20. HYDROLANT 844/11 · Exercises2011-05-19 → 2011-05-26
    Hazardous operations 1. hazardous operations 0900Z to 2130Z 24 thru 26 may in area bound by 22-58.72S…

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