South Atlantic Ocean

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

in force
24
last 12 months
131
since 1975
17,976
categories
21

In force now · 24

  1. HYDROLANT 1800/26 · Nav aids2026-09-11
    Chapeu Virado Light at 01-08.12S 048-28.14W in Brazil, South Atlantic, is unlit.
  2. HYDROLANT 1798/26 · Missiles2026-09-11
    Brazil warns of hazardous rocket launching operations daily from 0800 to 2000 hours September 15 through 17 in a defined area of the South Atlantic.
  3. HYDROLANT 1797/26 · Surveys2026-09-11
    Survey operations are underway off Brazil in the South Atlantic until 10 November 2027; vessels should give wide berth to the vessel REM SALTIRE in the listed area.
  4. 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.
  5. 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.
  6. HYDROLANT 1462/26 · Exercises2026-07-29
    Hazardous operations are occurring off Brazil in a bounded area from August 3 through September 11.
  7. 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.
  8. 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.
  9. 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.
  10. 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.
  11. 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.
  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 657/26 · Nav aids2026-04-02
    Radar beacon at Cabo Sao Tome light is off air until 28 Sep.
  18. 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.
  19. 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.
  20. HYDROLANT 627/26 · Nav aids2026-03-30
    Light at Laje da Conceicao, 24-14.18S 046-41.46W, is unlit until 24 September.
  21. HYDROLANT 582/26 · Wrecks2026-03-23
    Foul ground exists in a bounded area off Brazil until December 6, 2027.
  22. 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.
  23. HYDROLANT 1213/25 · Wrecks2025-07-19
    Depths are less than charted in three areas off Brazil in the South Atlantic.
  24. 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%
Surveys2,31213%
Nav aids1,96611%
Exercises1,95111%
Incidents1,5909%
Quakes5833%
Derelicts4683%
Other2702%
Missiles1991%
Wrecks1351%
Debris730%
Restricted660%
Structures600%
Containers380%
Piracy130%
Towing120%
Spills50%
Mines50%
Ordnance10%
War risk10%

Archive · 17,952 cancelled

  1. HYDROLANT 2554/99 · Exercises1999-11-27 → 1999-12-10
    Hazardous operations 1100Z to 1900Z daily 30 nov thru 10 dec in area bound by 05-54.0S 035-11.0W, 05-56.0S…
  2. HYDROLANT 2550/99 · Icebergs1999-11-27 → 1999-11-03
    Very large icebergs reported on 26 nov: a. 12 miles by 35 miles vicinity 58-04S 045-20W
  3. HYDROPAC 1311/99 · Icebergs1999-11-27 → 1999-12-03
    Very large icebergs reported on 26 nov: a. 12 miles by 35 miles vicinity 58-04S 045-20W
  4. HYDROLANT 2548/99 · Nav aids1999-11-26 → 1999-11-30
    Risca do zumbi lightship 05-11.0S 035-11.2W unlit
  5. HYDROLANT 2547/99 · Incidents1999-11-26 → 2000-01-07
    55 meter F/V hsiang jang 102, white hull, 29 persons on board, overdue
  6. HYDROLANT 2543/99 · Exercises1999-11-26 → 1999-11-27
    Hazardous operations 1600Z to 2030Z daily 30 nov thru 03 dec in area bound by 05-54-01S 035-11-01W,…
  7. HYDROLANT 2528/99 · Cable ops1999-11-24 → 1999-12-03
    Seismic survey in progress until further notice by M/V akademik shatskit towing six mile long cable along…
  8. HYDROLANT 2527/99 · Cable ops1999-11-24 → 1999-11-28
    Seismic survey in progress until further notice by M/V geo arctic towing five mile long cable along…
  9. HYDROLANT 2520/99 · Nav aids1999-11-24 → 1999-12-19
    Radiobeacon at chui light 33-44.5S 053-22.3W off air until 18 dec
  10. HYDROPAC 1299/99 · Icebergs1999-11-24 → 1999-12-01
    Very large iceberg, 12 miles by 35 miles, reported vicinity 56-25S 043-24W on 14 nov
  11. HYDROLANT 2519/99 · Icebergs1999-11-24 → 1999-12-01
    Very large iceberg, 12 miles by 35 miles, reported vicinity 56-25S 043-24W on 14 nov
  12. HYDROPAC 1298/99 · Icebergs1999-11-24 → 1999-11-27
    Very large icebergs reported on 19 nov: a. 12 miles by 35 miles vicinity 58-16S 045-26W
  13. HYDROLANT 2518/99 · Icebergs1999-11-24 → 1999-11-27
    Very large icebergs reported on 19 nov: a. 12 miles by 35 miles vicinity 58-16S 045-26W
  14. HYDROLANT 2508/99 · Cable ops1999-11-23 → 1999-11-27
    Seismic survey in progress until 26 nov by M/V mezen towing 7350 meter long cable along trackline joining…
  15. HYDROLANT 2491/99 · Cable ops1999-11-21 → 1999-11-23
    Seismic survey in progress until 26 nov by M/V mezen towing 750 meter long cable along trackline joining…
  16. HYDROLANT 2485/99 · Exercises1999-11-20 → 1999-11-22
    Hazardous operations 241500Z to 241600Z nov in area bound by 23-02.00S 043-51.65W, 23-05.00S 043-51.65W,…
  17. HYDROPAC 1267/99 · Icebergs1999-11-20 → 1999-11-24
    Very large icebergs reported on 19 nov: a. 10 miles by 37 miles vicinity 57-18S 045-24W
  18. HYDROLANT 2483/99 · Icebergs1999-11-20 → 1999-11-24
    Very large icebergs reported on 19 nov: a. 10 miles by 37 miles vicinity 57-18S 045-24W
  19. HYDROLANT 2472/99 · Exercises1999-11-18 → 1999-12-03
    Hazardous operations 1100Z to 1900Z daily 22 nov thru 10 dec within 20 miles of 05-55S 034-45W
  20. HYDROLANT 2471/99 · Nav aids1999-11-18 → 1999-11-21
    Ponta da tabatinga light 06-02.7S 035-06.8W unlit

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