South Atlantic Ocean

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

in force
21
last 12 months
120
since 1975
17,965
categories
21

In force now · 21

  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. 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.
  7. 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.
  8. 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.
  9. 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.
  10. 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.
  11. HYDROLANT 900/26 · Nav aids2026-05-07
    Tamandare Light in Brazil is unlit until November 2.
  12. 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.
  13. 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.
  14. HYDROLANT 657/26 · Nav aids2026-04-02
    Radar beacon at Cabo Sao Tome light is off air until 28 Sep.
  15. 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.
  16. 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.
  17. HYDROLANT 627/26 · Nav aids2026-03-30
    Light at Laje da Conceicao, 24-14.18S 046-41.46W, is unlit until 24 September.
  18. HYDROLANT 582/26 · Wrecks2026-03-23
    Foul ground exists in a bounded area off Brazil until December 6, 2027.
  19. 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.
  20. HYDROLANT 1213/25 · Wrecks2025-07-19
    Depths are less than charted in three areas off Brazil in the South Atlantic.
  21. 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%
Icebergs3,05417%
Surveys2,30913%
Nav aids1,96311%
Exercises1,95111%
Incidents1,5909%
Quakes5833%
Derelicts4683%
Other2691%
Missiles1971%
Wrecks1351%
Debris730%
Restricted660%
Structures600%
Containers380%
Piracy130%
Towing120%
Spills50%
Mines50%
Ordnance10%
War risk10%

Archive · 17,944 cancelled

  1. HYDROLANT 1878/02 · Cable ops2002-08-24 → 2002-08-29
    Seismic survey in progress until 290259Z aug by M/V veritas viking II towing six 6500 meter long cables in…
  2. HYDROLANT 1876/02 · Exercises2002-08-24 → 2002-08-28
    Hazardous operations 281200Z to 282000Z aug in area bound by 05-54S 035-11W, 05-56S 035-11W, 06-04S 034-57W,…
  3. HYDROLANT 1875/02 · Derelicts2002-08-24 → 2002-08-24
    Derelict F/V victoria II adrift vicinity 45-08S 065-08W
  4. HYDROLANT 1855/02 · Incidents2002-08-22 → 2002-09-10
    Last known position 44-17S 065-00W at 191700Z aug
  5. HYDROLANT 1837/02 · Surveys2002-08-20 → 2002-08-28
    Oceanographic operations 23 thru 30 aug by M/V almirante camara in area bound by 04-34S 037-17W, 05-10S…
  6. HYDROLANT 1829/02 · Derelicts2002-08-18 → 2002-08-20
    S/V eduina adrift vicinity 07-44S 034-43W at 180903Z aug
  7. HYDROLANT 1823/02 · Surveys2002-08-17 → 2002-08-29
    Oceanographic operations 22 thru 28 aug by M/V antares in area bound by 35-21S 049-48W, 33-51S 053-00W,…
  8. HYDROLANT 1820/02 · Cable ops2002-08-17 → 2002-08-24
    Seismic survey in progress until 240259Z aug by M/V veritas viking I towing six 6000 meter long cables in…
  9. HYDROLANT 1819/02 · Cable ops2002-08-17 → 2002-08-24
    Seismic survey in progress until 240259Z aug by M/V veritas viking II towing six 6500 meter long cables in…
  10. HYDROLANT 1805/02 · Nav aids2002-08-15 → 2002-09-06
    Ponta da praia grande light 01-07.2S 045-37.6W unlit
  11. HYDROLANT 1796/02 · Cable ops2002-08-14 → 2002-08-17
    Seismic survey in progress until 170259Z aug by M/V veritas viking II towing six 6500 meter long cables in…
  12. HYDROLANT 1794/02 · Cable ops2002-08-14 → 2002-08-17
    Seismic survey in progress until 170259Z aug by M/V veritas viking I towing six 6000 meter long cables in…
  13. HYDROLANT 1776/02 · Derelicts2002-08-10 → 2002-08-11
    F/V iglu adrift vicinity 46-07S 062-13W
  14. HYDROLANT 1775/02 · Icebergs2002-08-10 → 2002-08-17
    Iceberg reported in 51-25S 020-26W at 090900Z aug
  15. HYDROLANT 1773/02 · Cable ops2002-08-10 → 2002-08-12
    Seismic survey in progress until 11 aug by M/V bulldog towing 15 meter long cable in area bound by 11-02.1S…
  16. HYDROLANT 1772/02 · Cable ops2002-08-10 → 2002-08-14
    Seismic survey in progress until 140259Z aug by M/V veritas viking I towing six 6000 meter long cables in…
  17. HYDROLANT 1771/02 · Cable ops2002-08-10 → 2002-08-15
    Seismic survey in progress until 14 aug by M/V ramform explorer towing eight 6852 meter long cables in area…
  18. HYDROLANT 1769/02 · Cable ops2002-08-10 → 2002-08-14
    Seismic survey in progress until 140259Z aug by M/V veritas viking II towing six 6500 meter long cables in…
  19. HYDROLANT 1758/02 · Derelicts2002-08-07 → 2002-08-14
    Derelict M/V c. tahsin adrift in 23-05.7S 007-53.9E at 051300Z aug
  20. HYDROLANT 1754/02 · Cable ops2002-08-07 → 2002-08-10
    Seismic survey in progress until 09 aug by M/V ramform explorer towing eight 6852 meter long cables in area…

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