South Atlantic Ocean

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

in force
21
last 12 months
128
since 1975
17,973
categories
21

In force now · 21

  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. 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.
  7. 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.
  8. 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.
  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 657/26 · Nav aids2026-04-02
    Radar beacon at Cabo Sao Tome light is off air until 28 Sep.
  15. 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.
  16. 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.
  17. HYDROLANT 627/26 · Nav aids2026-03-30
    Light at Laje da Conceicao, 24-14.18S 046-41.46W, is unlit until 24 September.
  18. HYDROLANT 582/26 · Wrecks2026-03-23
    Foul ground exists in a bounded area off Brazil until December 6, 2027.
  19. 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.
  20. HYDROLANT 1213/25 · Wrecks2025-07-19
    Depths are less than charted in three areas off Brazil in the South Atlantic.
  21. 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 582/26 · Wrecks2026-03-23
    Foul ground exists in a bounded area off Brazil until December 6, 2027.
  5. HYDROLANT 627/26 · Nav aids2026-03-30
    Light at Laje da Conceicao, 24-14.18S 046-41.46W, is unlit until 24 September.

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%
Icebergs3,05617%
Surveys2,31113%
Nav aids1,96511%
Exercises1,95111%
Incidents1,5909%
Quakes5833%
Derelicts4683%
Other2702%
Missiles1981%
Wrecks1351%
Debris730%
Restricted660%
Structures600%
Containers380%
Piracy130%
Towing120%
Mines50%
Spills50%
War risk10%
Ordnance10%

Archive · 17,952 cancelled

  1. HYDROLANT 3813/00 · Cable ops2000-11-13 → 2000-11-16
    Seismic survey in progress until 15 nov by M/V northern access towing 8704 meter long cable in area bound by…
  2. HYDROLANT 3812/00 · Cable ops2000-11-13 → 2000-11-15
    Seismic survey in progress until 15 nov by M/V geco tau towing 8300 meter long cable in area bound by 02-40S…
  3. HYDROLANT 3809/00 · Cable ops2000-11-12 → 2000-11-13
    Seismic survey in progress until 14 nov by M/V northern access towing 8704 meter long cable in area bound by…
  4. USGS-USP000A3F8 · Quakes2000-11-12 → 2000-11-15
    Earthquake magnitude 5.5 (mwc) in 55.359S 029.896W, depth 33 km at 120329Z nov 00
  5. HYDROLANT 3803/00 · Cable ops2000-11-11 → 2000-11-16
    Seismic survey in progress until 15 nov by M/V cgg harmattan towing six 6482 meter long cables in area bound…
  6. HYDROLANT 3802/00 · Cable ops2000-11-11 → 2000-11-14
    Seismic survey in progress until 13 nov by M/V ramform explorer towing eight 7500 meter long cables in area…
  7. HYDROLANT 3792/00 · Cable ops2000-11-10 → 2000-11-13
    Seismic survey in progress until 12 nov by M/V ramform victory, M/V falcon explorer and M/V sanco sea towing…
  8. HYDROLANT 3791/00 · Nav aids2000-11-10 → 2000-11-18
    Dgps station and RACON at cabo calcanhar light 05-09.6S 035-29.2W inoperative
  9. HYDROLANT 3790/00 · Cable ops2000-11-10 → 2000-11-13
    Seismic survey in progress until 12 nov by M/V western regent and M/V western kenda towing eight 4000 meter…
  10. HYDROLANT 3771/00 · Cable ops2000-11-09 → 2000-11-13
    Seismic survey in progress until 14 nov by M/V geco tau towing 8300 meter long cable in area bound by 02-30S…
  11. HYDROLANT 3769/00 · Cable ops2000-11-09 → 2000-11-12
    Seismic survey in progress until 11 nov by M/V northern access towing 8704 meter long cable in area bound by…
  12. HYDROLANT 3756/00 · Cable ops2000-11-08 → 2000-11-12
    Underwater cable operations in progress until 122000Z nov by M/V osa vigilant towing submersible along…
  13. HYDROLANT 3755/00 · Incidents2000-11-08 → 2000-11-24
    Man overboard in 23-49S 045-55W
  14. USGS-USP000A35E · Quakes2000-11-07 → 2000-11-10
    Earthquake magnitude 5.5 (mwc) in 55.136S 029.617W, depth 33 km at 071631Z nov 00
  15. HYDROLANT 3747/00 · Cable ops2000-11-07 → 2000-11-09
    Seismic survey in progress until 08 nov by M/V geco tau towing 8300 meter long cable in area bound by 03-21S…
  16. HYDROLANT 3746/00 · Cable ops2000-11-07 → 2000-11-11
    Seismic survey in progress until 10 nov by M/V cgg harmattan towing six 6482 meter long cables in area bound…
  17. HYDROLANT 3745/00 · Cable ops2000-11-07 → 2000-11-09
    Seismic survey in progress until 08 nov by M/V northern access towing 8704 meter long cable in area bound by…
  18. HYDROLANT 3744/00 · Cable ops2000-11-07 → 2000-11-12
    Seismic survey in progress until 11 nov by M/V ramform explorer towing eight 7500 meter long cables in area…
  19. HYDROLANT 3743/00 · Cable ops2000-11-07 → 2000-11-10
    Seismic survey in progress until 09 nov by M/V western regent and M/V western kenda towing eight 4000 meter…
  20. HYDROLANT 3742/00 · Surveys2000-11-07 → 2000-11-17
    Survey operations in progress until 16 nov by M/V almirante camara in area bound by 02-18S 039-21W, 03-05S…

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