South Atlantic Ocean

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

in force
24
last 12 months
131
since 1975
17,976
categories
21

In force now · 24

  1. HYDROLANT 1800/26 · Nav aids2026-09-11
    Chapeu Virado Light at 01-08.12S 048-28.14W in Brazil, South Atlantic, is unlit.
  2. HYDROLANT 1798/26 · Missiles2026-09-11
    Brazil warns of hazardous rocket launching operations daily from 0800 to 2000 hours September 15 through 17 in a defined area of the South Atlantic.
  3. HYDROLANT 1797/26 · Surveys2026-09-11
    Survey operations are underway off Brazil in the South Atlantic until 10 November 2027; vessels should give wide berth to the vessel REM SALTIRE in the listed area.
  4. 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.
  5. 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.
  6. HYDROLANT 1462/26 · Exercises2026-07-29
    Hazardous operations are occurring off Brazil in a bounded area from August 3 through September 11.
  7. 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.
  8. 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.
  9. 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.
  10. 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.
  11. 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.
  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 657/26 · Nav aids2026-04-02
    Radar beacon at Cabo Sao Tome light is off air until 28 Sep.
  18. 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.
  19. 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.
  20. HYDROLANT 627/26 · Nav aids2026-03-30
    Light at Laje da Conceicao, 24-14.18S 046-41.46W, is unlit until 24 September.
  21. HYDROLANT 582/26 · Wrecks2026-03-23
    Foul ground exists in a bounded area off Brazil until December 6, 2027.
  22. 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.
  23. HYDROLANT 1213/25 · Wrecks2025-07-19
    Depths are less than charted in three areas off Brazil in the South Atlantic.
  24. 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%
Surveys2,31213%
Nav aids1,96611%
Exercises1,95111%
Incidents1,5909%
Quakes5833%
Derelicts4683%
Other2702%
Missiles1991%
Wrecks1351%
Debris730%
Restricted660%
Structures600%
Containers380%
Piracy130%
Towing120%
Spills50%
Mines50%
Ordnance10%
War risk10%

Archive · 17,952 cancelled

  1. HYDROLANT 398/00 · Cable ops2000-02-02 → 2000-02-04
    Seismic survey in progress until 03 feb by M/V akademik shatskiy towing 8400 meter long cable in area bound…
  2. HYDROLANT 396/00 · Cable ops2000-02-02 → 2000-02-04
    Seismic survey in progress until 03 feb by M/V geco marlin towing 8400 meter long cable along trackline…
  3. HYDROLANT 395/00 · Cable ops2000-02-02 → 2000-02-04
    Seismic survey in progress until 03 feb by M/V geco diamond towing eight 6000 meter long cables in area…
  4. HYDROLANT 393/00 · Cable ops2000-02-02 → 2000-02-05
    Seismic survey in progress until 04 feb by M/V ramform explorer towing 4500 meter long cable in area bound…
  5. HYDROLANT 392/00 · Cable ops2000-02-02 → 2000-02-03
    Seismic survey 03 thru 05 feb by M/V geo arctic towing 16700 meter long cable in area bound by 24-19S…
  6. HYDROPAC 201/00 · Icebergs2000-02-01 → 2000-02-08
    Large iceberg, 35 miles by 12 miles, reported in 56-15S 036-58W on 15 jan
  7. HYDROLANT 383/00 · Icebergs2000-02-01 → 2000-02-08
    Large icebergs reported: a. five miles by 12 miles in 52-20S 042-11W on 26 jan
  8. HYDROLANT 376/00 · Cable ops2000-02-01 → 2000-02-04
    Seismic survey in progress until 03 feb by M/V geco tau towing four 4600 meter long cables in area bound by…
  9. HYDROLANT 375/00 · Cable ops2000-02-01 → 2000-02-02
    Seismic survey in progress until 03 feb by M/V geco eagle towing eight 8000 meter long cables in area bound…
  10. HYDROLANT 374/00 · Cable ops2000-02-01 → 2000-02-05
    Seismic survey in progress until 04 feb by M/V western atlas towing 5000 meter long cable in area bound by…
  11. HYDROPAC 196/00 · Exercises2000-01-31 → 2000-02-01
    Hazardous operations 011729Z to 012234Z feb within 30 miles of trackline joining 55-22S 174-23E, 54-27S…
  12. HYDROLANT 365/00 · Nav aids2000-01-31 → 2000-06-30
    Ponta da praia grande light, FL(5) w 60 sec 48 meters 24 miles, established in 01-07.2S 045-37.6W
  13. HYDROLANT 364/00 · Cable ops2000-01-31 → 2000-02-02
    Seismic survey 01 thru 03 feb by M/V ramform vanguard towing 4500 meter long cable in area bound by 24-00S…
  14. HYDROLANT 363/00 · Cable ops2000-01-31 → 2000-02-02
    Seismic survey in progress until 01 feb by M/V geco diamond towing eight 6000 meter long cables in area…
  15. HYDROLANT 361/00 · Cable ops2000-01-31 → 2000-02-02
    Seismic survey in progress until 02 feb by M/V northerm access towing one 8000 meter long cable and four 100…
  16. HYDROLANT 360/00 · Cable ops2000-01-31 → 2000-02-02
    Seismic survey in progress until 02 feb by M/V ramform viking towing 4500 meter long cable in area bound by…
  17. HYDROLANT 359/00 · Cable ops2000-01-31 → 2000-02-02
    Seismic survey in progress until 02 feb by M/V geo arctic towing 16688 meter long cable in area bound by…
  18. HYDROLANT 356/00 · Cable ops2000-01-31 → 2000-02-02
    Seismic survey in progress until 02 feb by M/V geco marlin towing 8400 meter long cable in area bound by…
  19. HYDROLANT 354/00 · Exercises2000-01-30 → 2000-02-06
    Hazardous operations 261100Z jan to 061700Z feb in area bound by 02-13.0S 043-39.3W, 01-34.0S 043-19.0W,…
  20. HYDROLANT 350/00 · Cable ops2000-01-30 → 2000-02-01
    Seismic survey in progress until 31 jan by M/V ramform explorer towing 4800 meter long cable in area bound…

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