South Atlantic Ocean

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

in force
28
last 12 months
118
since 1975
17,963
categories
21

In force now · 28

  1. NAVAREA 7 251/26 · Other2026-09-04
    As of 4 September 2026, mining and exploration vessels are operating off Orange River Mouth, Namibia; keep 2 nautical miles clear until further notice.
  2. NAVAREA 7 246/26 · Cable ops2026-08-24
    On 24 Aug 2026, seismic survey vessel Ramform Victory is towing 12 cables in the South Atlantic near Orange River mouth; wide berth requested.
  3. HYDROLANT 1462/26 · Exercises2026-07-29
    Hazardous operations are occurring off Brazil in a bounded area from August 3 through September 11.
  4. 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.
  5. NAVAREA 7 221/26 · Other2026-07-29
    A special buoy with a yellow occulting light is spotted at 28-35.8S 013-54.7E off Oranjemund, South Atlantic; caution advised.
  6. HYDROLANT 1407/26 · Nav aids2026-07-22
    The radiobeacon at Chui Light, Brazil, is off air until 17 Jan 27.
  7. 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.
  8. 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.
  9. 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.
  10. HYDROLANT 1021/26 · Surveys2026-05-27
    Survey operations continue until August 31, 2200 UTC in the South Atlantic off Brazil; wide berth requested.
  11. 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.
  12. 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.
  13. 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.
  14. HYDROLANT 900/26 · Nav aids2026-05-07
    Tamandare Light in Brazil is unlit until November 2.
  15. 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.
  16. 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.
  17. 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.
  18. HYDROLANT 657/26 · Nav aids2026-04-02
    Radar beacon at Cabo Sao Tome light is off air until 28 Sep.
  19. 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.
  20. 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.
  21. HYDROLANT 627/26 · Nav aids2026-03-30
    Light at Laje da Conceicao, 24-14.18S 046-41.46W, is unlit until 24 September.
  22. HYDROLANT 582/26 · Wrecks2026-03-23
    Foul ground exists in a bounded area off Brazil until December 6, 2027.
  23. HYDROLANT 453/26 · Nav aids2026-03-07
    Caete Light at 00-49S 046-36W is destroyed; message cancels on September 3, 2026.
  24. 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.
  25. 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.
  26. 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.
  27. HYDROLANT 1213/25 · Wrecks2025-07-19
    Depths are less than charted in three areas off Brazil in the South Atlantic.
  28. 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

75
78
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 ops5,17229%
Icebergs3,05317%
Surveys2,30813%
Nav aids1,96311%
Exercises1,95111%
Incidents1,5909%
Quakes5833%
Derelicts4683%
Other2691%
Missiles1971%
Wrecks1351%
Debris730%
Restricted660%
Structures600%
Containers380%
Piracy130%
Towing120%
Spills50%
Mines50%
Ordnance10%
War risk10%

Archive · 17,935 cancelled

  1. HYDROLANT 241/04 · Cable ops2004-02-10 → 2004-02-12
    Seismic survey in progress until 120159Z feb by M/V cgg harmattan towing six 6000 meter long cables in area…
  2. HYDROLANT 240/04 · Cable ops2004-02-10 → 2004-02-12
    Seismic survey in progress until 120159Z feb by M/V polar princess towing 6000 meter long cable in area…
  3. HYDROLANT 234/04 · Cable ops2004-02-08 → 2004-02-12
    Seismic survey in progress until 120300Z feb by M/V ramform viking towing eight 6000 meter long cables in…
  4. HYDROLANT 229/04 · Surveys2004-02-08 → 2004-04-07
    Underwater operations in progress until further notice by M/V saipem 10000 in 06-01.4S 010-39.5E
  5. HYDROLANT 224/04 · Nav aids2004-02-07 → 2005-01-19
    RACON at simao grande light 00-15S 048-24W inoperative
  6. HYDROLANT 223/04 · Icebergs2004-02-07 → 2004-02-14
    Icebergs reported on 06 feb: a. A-38A, 20 miles by 31 miles in 53-44S 034-10W
  7. HYDROLANT 222/04 · Cable ops2004-02-07 → 2004-02-11
    Seismic survey in progress until 10 feb by M/V bulldog towing two 15 meter long cables in area bound by…
  8. HYDROLANT 217/04 · Cable ops2004-02-06 → 2004-02-11
    Seismic survey in progress until 10 feb by M/V tropicaliente towing two 20 meter long cables in area bound…
  9. HYDROLANT 216/04 · Cable ops2004-02-06 → 2004-02-10
    Seismic survey in progress until 100159Z feb by M/V polar princess towing 6000 meter long cable in area…
  10. HYDROLANT 215/04 · Cable ops2004-02-06 → 2004-02-10
    Seismic survey in progress until 100159Z feb by M/V cgg harmattan towing six 6000 meter long cables in area…
  11. HYDROLANT 214/04 · Incidents2004-02-06 → 2004-02-24
    Distress signal received on 406 mhz in 34-20.6S 031-58.9W and 37-47.9S 049-47.6W at 042152Z feb
  12. HYDROLANT 210/04 · Cable ops2004-02-05 → 2004-02-08
    Seismic survey in progress until 07 feb by M/V bulldog towing two 15 meter long cables in area bound by…
  13. HYDROLANT 208/04 · Incidents2004-02-05 → 2004-02-07
    Distress signal received vicinity 28-30S 036-54W
  14. HYDROLANT 198/04 · Cable ops2004-02-03 → 2004-02-06
    Seismic survey in progress until 060159Z feb by M/V cgg harmattan towing six 6000 meter long cables in area…
  15. HYDROLANT 197/04 · Cable ops2004-02-03 → 2004-02-06
    Seismic survey in progress until 060159Z feb by M/V polar princess towing 6000 meter long cable in area…
  16. HYDROLANT 193/04 · Cable ops2004-02-02 → 2004-02-05
    Seismic survey in progress until 04 feb by M/V tropicaliente towing two 20 meter long cables in area bound…
  17. HYDROLANT 189/04 · Incidents2004-02-02 → 2004-02-05
    Man overboard in 17-11S 038-57W at 310000Z jan
  18. HYDROLANT 185/04 · Cable ops2004-02-01 → 2004-02-03
    Seismic survey in progress until 030159Z feb by M/V polar princess towing 6000 meter long cable in area…
  19. HYDROLANT 184/04 · Cable ops2004-02-01 → 2004-02-03
    Seismic survey in progress until 030159Z feb by M/V cgg harmattan towing six 6000 meter long cables in area…
  20. HYDROLANT 179/04 · Surveys2004-01-30 → 2004-02-21
    Oceanographic operations 01 thru 20 feb by M/V antares in area bound by 23-00S 043-10W, 23-50S 040-00W,…

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