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 1994/03 · Nav aids2003-10-23 → 2003-10-28
    Morro taipus light 13-57.2S 038-56.5W unlit
  2. HYDROLANT 1993/03 · Icebergs2003-10-23 → 2003-10-30
    Icebergs reported on 20 oct: a. A-38A, 22 miles by 48 miles in 58-12S 043-00W
  3. HYDROLANT 1992/03 · Surveys2003-10-23 → 2003-11-17
    Oceanographic survey 26 oct thru 16 nov by M/V amorim do valle in area bound by 25-40.5S 048-25.0W, 25-37.0S…
  4. HYDROLANT 1990/03 · Cable ops2003-10-23 → 2003-10-27
    Seismic survey in progress until 270159Z oct by M/V veritas viking I towing six 6000 meter long cables in…
  5. HYDROLANT 1989/03 · Surveys2003-10-23 → 2003-11-01
    Hydrographic survey in progress until 010300Z nov by M/V rou 22 oyarvide in area bound by 34-47.0S…
  6. HYDROLANT 1988/03 · Nav aids2003-10-23 → 2003-10-23
    Radiobeacon at cabo polonio light 34-24S 053-47W off air
  7. HYDROLANT 1987/03 · Derelicts2003-10-23 → 2003-10-23
    Derelict F/V san andres apostal adrift vicinity 40-25S 059-05W
  8. HYDROLANT 1983/03 · Nav aids2003-10-22 → 2003-10-24
    Santo alberto light 05-03.1S 036-02.3W unlit
  9. HYDROLANT 1981/03 · Cable ops2003-10-22 → 2003-10-24
    Seismic survey in progress until 250159Z oct by M/V cgg harmattan towing six 6000 meter long cables along…
  10. HYDROLANT 1976/03 · Cable ops2003-10-21 → 2003-10-22
    Seismic survey in progress until 250259Z oct by M/V cgg harmattan towing six 6000 meter long cables along…
  11. HYDROLANT 1975/03 · Nav aids2003-10-21 → 2003-10-25
    Radiobeacon and dgps station at sergipe light 10-58.2S 037-02.2W inoperative
  12. USGS-USP000CAW2 · Quakes2003-10-20 → 2003-10-23
    Earthquake magnitude 5.6 (mwb) in 58.090S 026.248W, depth 157 km at 201650Z oct 03
  13. HYDROLANT 1956/03 · Surveys2003-10-18 → 2003-11-01
    Oceanographic operations 19 thru 31 oct by M/V antares in area bound by 20-40S 040-00W, 21-30S 040-15W,…
  14. HYDROLANT 1953/03 · Incidents2003-10-18 → 2003-10-19
    Distress signal received from M/V santa isabela in 00-44S 041-31W
  15. HYDROLANT 1949/03 · Cable ops2003-10-17 → 2003-10-23
    Seismic survey in progress until 230159Z oct by M/V veritas viking I towing six 6000 meter long cables in…
  16. HYDROLANT 1948/03 · Nav aids2003-10-17 → 2003-12-19
    Dgps station at ilha da moela light 24-03.1S 046-15.9W inoperative
  17. HYDROLANT 1947/03 · Icebergs2003-10-16 → 2003-10-23
    Icebergs reported in 42-15S 003-50W on 16 oct
  18. HYDROLANT 1934/03 · Cable ops2003-10-15 → 2003-10-17
    Seismic survey in progress until 170259Z oct by M/V veritas viking I towing six 6000 meter long cables in…
  19. HYDROLANT 1923/03 · Cable ops2003-10-13 → 2003-10-15
    Seismic survey in progress until 150259Z oct by M/V veritas viking I towing six 6000 meter long cables in…
  20. HYDROLANT 1922/03 · Icebergs2003-10-13 → 2003-10-20
    Icebergs reported on 12 oct: a. A-38A, 22 miles by 48 miles in 58-12S 043-00W

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