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
    Earthquake magnitude 6.2 (mww) in 56.206S 027.909W, depth 126 km at 022346Z sep 26
  2. NAVAREA 7 246/26 · Cable ops2026-08-24
    NAVAREA VII 246 of 2026 (24 aug 26) 1. south atlantic ocean - ne sector - offshore orange river mouth 2.…
  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
    NAVAREA VII 221 of 2026: (29 jul 26) 1. south atlantic ocean - ne sector - offshore oranjemund 2. charts san…
  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 850/09 · Cable ops2009-05-08 → 2009-05-15
    Seismic survey in progress until 15 may by M/V ramform valiant towing ten 8100 meter long cables in area…
  2. HYDROLANT 849/09 · Cable ops2009-05-08 → 2009-05-13
    Seismic survey by M/V discoverer: a. 08 may in area bound by 25-25S 047-25W, 25-25S 047-35W, 26-05S 048-20W,…
  3. HYDROLANT 846/09 · Exercises2009-05-07 → 2009-05-16
    Hazardous operations 110300Z to 160300Z may in areas bound by: a. 12-53.27S 038-37.70W, 12-53.02S…
  4. HYDROLANT 845/09 · Cable ops2009-05-07 → 2009-05-13
    Seismic survey 070300Z to 130259Z may by M/V ocean europe and M/V sanco star in area bound by 22-23.55S…
  5. HYDROLANT 844/09 · Exercises2009-05-07 → 2009-05-12
    Gunnery exercises 121100Z to 121500Z may within three miles of 23-07.2S 043-07.6W
  6. HYDROLANT 842/09 · Nav aids2009-05-07 → 2009-06-07
    Nga chart 24230 (20TH ed)
  7. HYDROLANT 841/09 · Derelicts2009-05-07 → 2009-05-14
    Derelict S/V dalkiri adrift in 29-45.6S 022-13.5W at 051700Z may
  8. HYDROLANT 839/09 · Incidents2009-05-06 → 2009-05-11
    F/V mataco II sank in 51-15S 067-58W
  9. HYDROLANT 836/09 · Derelicts2009-05-06 → 2009-05-07
    Derelict S/V dalkiri adrift in 29-42S 022-33W at 051700Z may
  10. HYDROLANT 835/09 · Cable ops2009-05-06 → 2009-05-09
    Seismic survey 060300Z to 090259Z may by M/V ramform sovereing towing 14 8100 meter long cables in area…
  11. HYDROLANT 833/09 · Cable ops2009-05-05 → 2009-05-07
    Seismic survey by M/V discoverer: a. 05 may in area bound by 27-30S 045-45W, 27-25S 045-45W, 26-25S 045-05W,…
  12. HYDROLANT 826/09 · Cable ops2009-05-05 → 2009-05-27
    Seismic survey in progress until further notice by M/V ramform challenger towing 12 5100 meter long cables…
  13. HYDROLANT 825/09 · Nav aids2009-05-05 → 2009-05-06
    Nga chart 24220 (14TH ed)
  14. HYDROLANT 824/09 · Derelicts2009-05-04 → 2009-05-06
    Derelict 32 foot S/V sea jade, white hull, adrift vicinity 22-57.3S 008-39.9W
  15. HYDROLANT 820/09 · Derelicts2009-05-04 → 2009-05-11
    Derelict ten meter S/V leda adrift in 54-09.8S 063-19.2W at 032100Z may
  16. HYDROLANT 818/09 · Incidents2009-05-02 → 2009-05-07
    Man overboard in 23-47.68S 045-09.51W at 020445Z may
  17. HYDROLANT 813/09 · Cable ops2009-05-02 → 2009-05-06
    Seismic survey 020300Z to 060259Z may by M/V ramform sovereing towing 14 8100 meter long cables in area…
  18. HYDROLANT 809/09 · Incidents2009-05-01 → 2009-05-06
    S/V dalkiri taking on water vicinity 31-09S 025-57W at 011713Z may
  19. HYDROLANT 807/09 · Nav aids2009-05-01 → 2009-10-07
    Nga chart 24270 (3RD ed)
  20. HYDROLANT 804/09 · Nav aids2009-05-01 → 2009-05-09
    Nga chart 24140 (18TH ed)

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