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%
Mines50%
Spills50%
War risk10%
Ordnance10%

Archive · 17,952 cancelled

  1. HYDROLANT 1703/99 · Cable ops1999-08-14 → 1999-09-12
    Seismic survey 15 aug until 30 sep by M/V western atlas towing four 6000 meter long cables in area bound by…
  2. HYDROLANT 1702/99 · Nav aids1999-08-14 → 1999-08-14
    Ilha rasa light 23-04S 043-09W unreliable
  3. HYDROPAC 779/99 · Icebergs1999-08-11 → 1999-08-18
    Large iceberg, approximate size 20 by 40 miles, reported vicinity 58-15S 056-15W on 08 aug
  4. HYDROLANT 1680/99 · Icebergs1999-08-11 → 1999-08-18
    Large iceberg, approximate size 20 by 40 miles, reported vicinity 58-15S 056-15W on 08 aug
  5. HYDROLANT 1671/99 · Incidents1999-08-11 → 1999-09-24
    Distress signal received vicinity 09-32S 035-21W
  6. HYDROLANT 1665/99 · Incidents1999-08-10 → 1999-08-12
    Liferaft, three persons on board, adrift in 33-37S 051-00W at 082130Z aug
  7. HYDROLANT 1659/99 · Incidents1999-08-09 → 1999-08-11
    F/V fishing fliper, six persons on board, adrift between 11-10S 037-10W and 11-28S 037-20W
  8. HYDROLANT 1658/99 · Incidents1999-08-09 → 1999-09-24
    Distress signals received from vessel on: a. 406 mhz vicinity 11-10-56S 000-33-55W and 11-24-51S 003-56-49W
  9. HYDROPAC 728/99 · Icebergs1999-08-05 → 1999-08-12
    Large iceberg, approximate size 21 by 42 miles, reported vicinity 58-36S 057-00W on 02 aug
  10. HYDROLANT 1625/99 · Icebergs1999-08-05 → 1999-08-12
    Large iceberg, approximate size 21 by 42 miles, reported vicinity 58-36S 057-00W on 02 aug
  11. HYDROLANT 1620/99 · Nav aids1999-08-05 → 1999-10-09
    Dgps beacon at abrolhos light 17-57.8S 038-41.7W inoperative
  12. HYDROLANT 1604/99 · Derelicts1999-08-03 → 1999-08-06
    Derelict F/V kasuga maru on fire and adrift in 52-34.7S 064-41.0W at 020903Z aug
  13. HYDROLANT 1594/99 · Incidents1999-08-02 → 1999-08-03
    Crewman on board M/V freeport minor with serious burns requires medical assistance in 27-37S 030-50W
  14. HYDROLANT 1587/99 · Incidents1999-08-01 → 1999-08-03
    Man overboard vicinity 25-22.5S 047-24.0W at 300600Z jul
  15. HYDROLANT 1585/99 · Incidents1999-08-01 → 1999-08-02
    Crewman with serious burns requiring medical assistance on board M/V freeport minor in 27-35S 031-04W
  16. HYDROLANT 1558/99 · Cable ops1999-07-29 → 1999-08-04
    Underwater cable operations in progress until 03 aug by M/V coastal connector between 23-02S 043-27W and…
  17. HYDROLANT 1555/99 · Nav aids1999-07-28 → 1999-10-15
    Sao marcos de fora (BF-3) lightfloat 01-34.9S 043-50.8W missing
  18. HYDROLANT 1554/99 · Nav aids1999-07-28 → 1999-08-19
    Risca do zumbi buoy 05-11.0S 035-11.2W missing
  19. HYDROLANT 1535/99 · Nav aids1999-07-26 → 1999-11-16
    Bahia san gregorio light 45-01.5S 065-37.8W unreliable
  20. HYDROLANT 1530/99 · Nav aids1999-07-25 → 1999-07-28
    Sao marcos de fora (BF-3) lightfloat 01-34.9S 043-50.8W missing

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