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 307/99 · Nav aids1999-02-10 → 1999-02-19
    Isla pinguino light 47-55S 065-43W unreliable
  2. HYDROLANT 300/99 · Nav aids1999-02-09 → 1999-03-05
    Dgps service and radiobeacon at moela light 24-03.1S 046-15.9W inoperative
  3. HYDROLANT 299/99 · Cable ops1999-02-09 → 1999-02-23
    Seismic survey in progress until 22 feb by M/V akademik lazarev towing 4500 meter long cable in area bound…
  4. HYDROLANT 262/99 · Incidents1999-02-04 → 1999-02-12
    10 meter yacht cosa nostra, white hull, overdue from buenos aires to rio de janeiro
  5. HYDROLANT 237/99 · Nav aids1999-02-02 → 1999-02-08
    Ilha do bom abrigo light 25-07S 047-52W unlit
  6. HYDROLANT 207/99 · Incidents1999-01-31 → 1999-02-01
    M/V lola, two persons on board, adrift in 13-19.0S 038-39.0W at 301930Z jan
  7. HYDROLANT 184/99 · Nav aids1999-01-28 → 1999-06-04
    Sao marcos de fora (BF-3) lightfloat 01-34.9S 043-50.8W missing
  8. HYDROLANT 166/99 · Nav aids1999-01-26 → 1999-03-05
    Itariri light 11-57.3S 037-37.3W temporarily changed to: fl w 11 sec
  9. HYDROLANT 129/99 · Incidents1999-01-21 → 1999-01-29
    Distress signal detected in 00-15.3S 041-26.3W at 201547Z jan
  10. HYDROLANT 121/99 · Incidents1999-01-20 → 1999-01-22
    F/V kalatxori requires medical assistance for crewman with fractured leg in 07-14.5S 032-55.5W at 202200Z jan
  11. HYDROLANT 114/99 · Incidents1999-01-20 → 1999-01-21
    Distress signal detected in 30-00S 030-00W at 190854Z jan
  12. HYDROLANT 109/99 · Incidents1999-01-19 → 1999-03-05
    Distress signal received on 406 mhz from M/V rio del oro in vicinity 28-18.6S 006-44.6W at 181832Z jan
  13. HYDROLANT 98/99 · Nav aids1999-01-16 → 1999-01-20
    Radiobeacon at salinopolis light 00-37.1S 047-21.3W off air until 19 jan
  14. HYDROLANT 93/99 · Incidents1999-01-15 → 1999-01-19
    Distress signal received on 412.8 khz in vicinity 30-00S 030-00W at 141727Z jan
  15. HYDROLANT 80/99 · Nav aids1999-01-14 → 1999-01-20
    Pecem light 03-33.0S 038-49.1W unlit
  16. HYDROLANT 75/99 · Other1999-01-13 → 1999-01-21
    Ponta do mel light 04-57.7S 036-52.6W at reduced intensity
  17. HYDROLANT 71/99 · Containers1999-01-12 → 1999-02-26
    49 containers lost overboard 17 dec from M/V ultra bremer in area bound by 33-32S 052-18W, 33-37S 052-14W,…
  18. HYDROLANT 70/99 · Nav aids1999-01-12 → 1999-01-21
    Berta light 30-28S 050-19W unlit
  19. HYDROLANT 69/99 · Nav aids1999-01-12 → 1999-01-23
    Radiobeacon and dgps service at abrolhos light 17-58S 038-42W inoperative
  20. HYDROLANT 2483/98 · Nav aids1998-12-29 → 1999-01-29
    Ararangua light 28-56S 048-22W unreliable and temporarily changed to: FL(2) w 15 sec

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