South Atlantic Ocean

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

in force
21
last 12 months
128
since 1975
17,973
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%
Icebergs3,05617%
Surveys2,31113%
Nav aids1,96511%
Exercises1,95111%
Incidents1,5909%
Quakes5833%
Derelicts4683%
Other2702%
Missiles1981%
Wrecks1351%
Debris730%
Restricted660%
Structures600%
Containers380%
Piracy130%
Towing120%
Spills50%
Mines50%
Ordnance10%
War risk10%

Archive · 17,952 cancelled

  1. HYDROLANT 3344/00 · Cable ops2000-09-29 → 2000-10-02
    Seismic survey in progress until 01 oct by M/V ramform victory, M/V sanco sea and M/V falcon explorer towing…
  2. HYDROLANT 3343/00 · Cable ops2000-09-29 → 2000-10-01
    Submarine cable operations 290001Z sep to 010800Z oct by cableship maersk defender along trackline joining…
  3. HYDROPAC 1439/00 · Icebergs2000-09-28 → 2000-10-05
    Very large icebergs detected: a. seven miles by 15.0 miles vicinity 58-01S 043-45W on 21 sep
  4. HYDROLANT 3339/00 · Icebergs2000-09-28 → 2000-10-05
    Very large icebergs detected: a. seven miles by 15.0 miles vicinity 58-01S 043-45W on 21 sep
  5. HYDROLANT 3332/00 · Cable ops2000-09-28 → 2000-10-01
    Seismic survey in progress until 30 sep by M/V ramform explorer towing eight 6500 meter long cables in area…
  6. HYDROLANT 3331/00 · Cable ops2000-09-28 → 2000-10-01
    Seismic survey in progress until 30 sep by M/V cgg harmattan towing 6000 meter long cable in area bound by…
  7. HYDROLANT 3330/00 · Cable ops2000-09-28 → 2000-09-29
    Seismic survey in progress until 28 sep by M/V northern access towing 8704 meter long cable in area bound by…
  8. HYDROLANT 3315/00 · Cable ops2000-09-27 → 2000-09-30
    Seismic survey in progress until 29 sep by M/V geco tau towing 8300 meter long cable in area bound by 05-00S…
  9. HYDROLANT 3314/00 · Surveys2000-09-27 → 2000-10-05
    Survey operations 29 sep thru 19 oct by M/V l'espoir towing 500 meter long cable along trackline joining…
  10. HYDROLANT 3313/00 · Cable ops2000-09-26 → 2000-09-28
    Seismic survey in progress until 27 sep by M/V northern access towing 8704 meter long cable in area bound by…
  11. HYDROLANT 3308/00 · Cable ops2000-09-26 → 2000-09-27
    Seismic survey in progress until 28 sep by M/V geco tau towing 8300 meter long cable in area bound by 05-00S…
  12. HYDROLANT 3307/00 · Cable ops2000-09-26 → 2000-09-29
    Seismic survey in progress until 28 sep by M/V ramform victory, M/V sanco sea and M/V falcon explorer towing…
  13. HYDROLANT 3306/00 · Cable ops2000-09-26 → 2000-09-29
    Seismic survey in progress until 28 sep by M/V ramform vanguard and M/V kondor explorer towing ten 4800…
  14. HYDROLANT 3304/00 · Cable ops2000-09-26 → 2000-10-01
    Seismic survey in progress until 30 sep by M/V western regent and M/V kenda towing eight 4000 meter long…
  15. HYDROLANT 3303/00 · Cable ops2000-09-26 → 2000-10-03
    1000 meter long seismic cable adrift in 22-11.2S 040-01.2W at 241335Z sep
  16. HYDROLANT 3292/00 · Cable ops2000-09-25 → 2000-09-28
    Seismic survey in progress until 27 sep by M/V ramform explorer towing eight 6500 meter long cables in area…
  17. HYDROLANT 3291/00 · Cable ops2000-09-25 → 2000-09-28
    Seismic survey in progress until 27 sep by M/V cgg harmattan towing 6000 meter long cable in area bound by…
  18. HYDROLANT 3290/00 · Cable ops2000-09-25 → 2000-09-29
    Cable laying operations 26 thru 29 sep by cableship maersk defender along trackline joining 03-45.4S…
  19. HYDROLANT 3289/00 · Surveys2000-09-25 → 2000-10-08
    Oceanographic survey in progress until 07 oct by M/V antares in area bound by 13-00S 038-20W, 14-00S…
  20. HYDROLANT 3286/00 · Incidents2000-09-24 → 2000-09-25
    F/V isaac II, 16 persons on board, aground vicinity 31-48S 051-37W

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