South Atlantic Ocean

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

in force
29
last 12 months
117
since 1975
17,962
categories
21

In force now · 29

  1. USGS-US7000TDRV · Quakes2026-09-02
    An earthquake of magnitude 6.2 struck the South Sandwich Islands region at 02:23:46 UTC on September 26, at a depth of 126 kilometers.
  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. NAVAREA 7 217/26 · Other2026-07-27
    NAVAREA VII 217 of 2026: (27 jul 26) 1. namibia - offshore orange river mouth 2. charts san 75 (int 2630),…
  7. HYDROLANT 1407/26 · Nav aids2026-07-22
    The radiobeacon at Chui Light, Brazil, is off air until 17 Jan 27.
  8. 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.
  9. 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.
  10. 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.
  11. HYDROLANT 1021/26 · Surveys2026-05-27
    Survey operations continue until August 31, 2200 UTC in the South Atlantic off Brazil; wide berth requested.
  12. 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.
  13. 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.
  14. 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.
  15. HYDROLANT 900/26 · Nav aids2026-05-07
    Tamandare Light in Brazil is unlit until November 2.
  16. 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.
  17. 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.
  18. 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.
  19. HYDROLANT 657/26 · Nav aids2026-04-02
    Radar beacon at Cabo Sao Tome light is off air until 28 Sep.
  20. 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.
  21. 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.
  22. HYDROLANT 627/26 · Nav aids2026-03-30
    Light at Laje da Conceicao, 24-14.18S 046-41.46W, is unlit until 24 September.
  23. HYDROLANT 582/26 · Wrecks2026-03-23
    Foul ground exists in a bounded area off Brazil until December 6, 2027.
  24. HYDROLANT 453/26 · Nav aids2026-03-07
    Caete Light at 00-49S 046-36W is destroyed; message cancels on September 3, 2026.
  25. 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.
  26. 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.
  27. 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.
  28. HYDROLANT 1213/25 · Wrecks2025-07-19
    Depths are less than charted in three areas off Brazil in the South Atlantic.
  29. 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%
Other2681%
Missiles1971%
Wrecks1351%
Debris730%
Restricted660%
Structures600%
Containers380%
Piracy130%
Towing120%
Spills50%
Mines50%
Ordnance10%
War risk10%

Archive · 17,933 cancelled

  1. HYDROLANT 1722/08 · Nav aids2008-10-16 → 2008-11-06
    Nga chart 24120 (9TH ed)
  2. HYDROLANT 1721/08 · Nav aids2008-10-16 → 2008-10-25
    Nga chart 24291(4TH ed)
  3. HYDROLANT 1716/08 · Exercises2008-10-15 → 2008-10-24
    Gunnery exercises 200900Z to 242100Z oct in area bound by 23-07.00S 043-57.08W, 23-03.08S 043-58.08W,…
  4. HYDROPAC 2008/08 · Icebergs2008-10-15 → 2008-10-22
    Icebergs reported on 14 oct: a. A-43K, 56-24S 036-24W
  5. HYDROLANT 1714/08 · Icebergs2008-10-15 → 2008-10-22
    Icebergs reported on 14 oct: a. A-43K, 56-24S 036-24W
  6. HYDROLANT 1713/08 · Cable ops2008-10-15 → 2008-10-19
    Seismic survey 150300Z to 190259Z oct by M/V discoverer in area bound by 28-11S 038-56W, 28-16S 038-56W,…
  7. HYDROLANT 1712/08 · Cable ops2008-10-15 → 2008-10-19
    Seismic survey 150300Z to 190259Z oct by M/V ramform valiant towing 12 6500 meter long cables in area bound…
  8. HYDROLANT 1703/08 · Incidents2008-10-14 → 2008-10-25
    Man overboard in 03-50.4S 032-25.3W at 121800Z oct
  9. HYDROLANT 1699/08 · Exercises2008-10-13 → 2008-10-22
    Hazardous operations 1100Z to 2000Z daily 18 thru 22 oct in area bound by 33-42.72S 053-20.62W, 33-39.20S…
  10. HYDROLANT 1696/08 · Exercises2008-10-12 → 2008-11-01
    Hazardous operations 0001Z to 2359Z daily 17 thru 31 oct in areas bound by: a. 05-54.2S 035-11.0W, 05-50.0S…
  11. HYDROLANT 1694/08 · Cable ops2008-10-12 → 2008-10-13
    Seismic survey in progress until 130259Z oct by M/V ramform sovereign towing 14 8100 meter long cables in…
  12. HYDROLANT 1690/08 · Wrecks2008-10-11 → 2009-03-07
    Nga chart 24240 (5TH ed)
  13. HYDROLANT 1685/08 · Cable ops2008-10-10 → 2008-10-15
    Seismic survey 130300Z to 150259Z oct by M/V discoverer in area bound by 28-11S 038-56W, 28-16S 038-56W,…
  14. HYDROLANT 1684/08 · Cable ops2008-10-10 → 2008-10-15
    Seismic survey in progress until 150259Z oct by M/V ramform valiant towing 12 6500 meter long cables in area…
  15. HYDROLANT 1678/08 · Exercises2008-10-10 → 2008-10-15
    Hazardous operations 151100Z to 151900Z oct within 20 miles of 14-40S 038-00W
  16. HYDROLANT 1674/08 · Cable ops2008-10-09 → 2008-10-12
    Seismic survey in progress until 120259Z oct by M/V ramform sovereign towing 14 8100 meter long cables in…
  17. HYDROLANT 1666/08 · Nav aids2008-10-08 → 2008-11-29
    Nga chart 24170(14TH ed)
  18. HYDROLANT 1663/08 · Exercises2008-10-08 → 2008-10-16
    Gunnery exercises 1000Z to 2030Z daily 13 thru 16 oct in area bound by 05-52.83S 035-06.50W, 05-50.00S…
  19. HYDROLANT 1661/08 · Exercises2008-10-08 → 2008-10-08
    Gunnery exercises 1000Z to 2030Z daily 13 thru 16 oct in area bound by 05-52.83S 035-06.50W, 05-50.00S…
  20. HYDROLANT 1659/08 · Cable ops2008-10-08 → 2008-10-11
    Seismic survey in progress until 110259Z oct by M/V discoverer in area bound by 28-58S 042-15W, 28-47S…

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