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 1367/04 · Nav aids2004-08-18 → 2004-08-19
    Morro de sao paulo light 13-22.5S 038-54.9W unlit
  2. HYDROLANT 1361/04 · Nav aids2004-08-17 → 2004-08-19
    Ponta paracuru light 03-24.0S 039-00.7W unlit
  3. HYDROLANT 1354/04 · Restricted2004-08-16 → 2004-08-18
    Navigation prohibited 0930Z to 2030Z daily 18 and 19 aug in area bound by 22-58.72S 042-02.15W, 23-01.00S…
  4. HYDROLANT 1351/04 · Incidents2004-08-15 → 2004-08-21
    Man overboard vicinity iguape (24-43S 047-34W) at 141120Z aug
  5. HYDROLANT 1350/04 · Incidents2004-08-15 → 2004-08-16
    Distress signal received vicinity 32-49.6S 046-17.1W
  6. HYDROLANT 1330/04 · Exercises2004-08-11 → 2004-08-20
    Hazardous operations 1230Z to 2000Z daily 16 to 20 aug within 1.5 miles of 02-17S 044-21W
  7. HYDROLANT 1296/04 · Cable ops2004-08-05 → 2004-08-08
    Seismic survey in progress until 080259Z aug by vessel cgg symphony towing eight 6000 meter long cables in…
  8. HYDROLANT 1295/04 · Nav aids2004-08-05 → 2004-08-11
    Cabo curioso light 49-11S 067-37W unlit
  9. HYDROLANT 1288/04 · Nav aids2004-08-03 → 2004-08-06
    Dgps station at ponta de calcanhar light 05-09.7S 035-29.1W at reduced range
  10. HYDROLANT 1280/04 · Other2004-08-01 → 2004-09-17
    Restricted oil and gas development area established within four miles of 06-19S 011-03E
  11. HYDROLANT 1275/04 · Nav aids2004-08-01 → 2004-08-05
    Belmonte light 15-51.8S 038-52.6W unlit
  12. HYDROLANT 1274/04 · Incidents2004-08-01 → 2004-09-15
    Man overboard vicinity baja de sao marcos (02-22S 044-07W) at 310800Z jul
  13. USGS-USP000D14T · Quakes2004-07-30 → 2004-08-02
    Earthquake magnitude 5.5 (mwb) in 57.261S 025.802W, depth 62 km at 301214Z jul 04
  14. HYDROLANT 1244/04 · Exercises2004-07-25 → 2004-07-31
    Gunnery exercises 301500Z to 302300Z jul within six miles of 35-00S 054-00W
  15. HYDROLANT 1243/04 · Derelicts2004-07-25 → 2004-07-27
    F/V lucia carmen adrift in 35-49S 052-46W
  16. HYDROLANT 1240/04 · Surveys2004-07-24 → 2004-08-14
    Survey operations in progress until 13 aug by M/V sirius H-31 along trackline between 09-30S 034-35W, 11-15S…
  17. HYDROLANT 1232/04 · Incidents2004-07-22 → 2004-07-25
    Aircraft ditched vicinity 22-07S 039-00W
  18. HYDROLANT 1230/04 · Other2004-07-22 → 2004-07-28
    Area dangerous to navigation until 272330Z jul in area bound by 21-58.0S 038-51.0W, 22-03.0S 038-36.5W,…
  19. HYDROLANT 1216/04 · Nav aids2004-07-20 → 2004-08-02
    Cabo virgenes light 52-20.0S 068-21.2W unlit
  20. HYDROLANT 1215/04 · Derelicts2004-07-20 → 2004-07-21
    Derelict F/V raquel adrift in 41-39S 059-06W

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