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%
Mines50%
Spills50%
War risk10%
Ordnance10%

Archive · 17,952 cancelled

  1. HYDROLANT 2470/99 · Incidents1999-11-18 → 1999-11-19
    Distress message received from F/V perola matala, four persons on board, vicinity 21-19.7S 040-25.7W at…
  2. HYDROLANT 2459/99 · Cable ops1999-11-16 → 1999-11-24
    Seismic survey in progress until 12 jan by M/V geo arctic towing five mile long cable along trackline…
  3. HYDROPAC 1250/99 · Icebergs1999-11-16 → 1999-11-20
    Very large icebergs reported on 15 nov: a. 10 miles by 37 miles vicinity 57-18S 045-24W
  4. HYDROLANT 2458/99 · Icebergs1999-11-16 → 1999-11-20
    Very large icebergs reported on 15 nov: a. 10 miles by 37 miles vicinity 57-18S 045-24W
  5. HYDROLANT 2457/99 · Incidents1999-11-15 → 1999-12-31
    Man overboard from M/V arizona vicinity 35-10S 018-35E at 151845Z nov
  6. HYDROLANT 2451/99 · Cable ops1999-11-15 → 1999-11-17
    Seismic survey 161100Z to 171700Z nov by M/V northern horizon along a trackline joining 03-41.7S 038-09.3W,…
  7. HYDROPAC 1229/99 · Icebergs1999-11-12 → 1999-11-16
    Very large icebergs reported on 11 nov: a. 10 miles by 37 miles vicinity 58-10S 052-36W
  8. HYDROLANT 2427/99 · Icebergs1999-11-12 → 1999-11-16
    Very large icebergs reported on 11 nov: a. 10 miles by 37 miles vicinity 58-10S 052-36W
  9. HYDROLANT 2422/99 · Cable ops1999-11-11 → 1999-11-16
    Seismic survey in progress until further notice by M/V geo arctic towing five mile long cable along…
  10. HYDROLANT 2414/99 · Cable ops1999-11-11 → 2000-02-11
    Underwater cable operations in progress until further notice within one mile of 36-34.97S 055-28.65W
  11. HYDROLANT 2412/99 · Derelicts1999-11-11 → 1999-11-12
    M/V mar de prata damaged and adrift vicinity 23-18S 042-40W at 092000Z nov
  12. HYDROLANT 2407/99 · Exercises1999-11-10 → 1999-11-19
    Hazardous operations 1200Z to 2000Z daily 11 thru 21 nov within 20 miles of 05-55S 034-45W
  13. HYDROLANT 2406/99 · Exercises1999-11-10 → 1999-11-19
    Hazardous operations 1500Z to 2200Z daily 14 thru 25 nov within: a. 22 miles of 01-45S 041-58W
  14. HYDROLANT 2405/99 · Nav aids1999-11-10 → 1999-11-28
    Rincon buoy 39-23.8S 061-29.0W unlit
  15. HYDROLANT 2404/99 · Nav aids1999-11-10 → 1999-11-19
    Ponta paracuru light 03-24.1S 039-00.7W unlit
  16. HYDROLANT 2399/99 · Cable ops1999-11-09 → 1999-11-24
    Seismic survey in progress until further notice by M/V akademik shatskit towing equipment vicinity 23-12.0S…
  17. HYDROLANT 2394/99 · Icebergs1999-11-09 → 1999-11-16
    Large iceberg sighted in 48-28S 037-40W at 082142Z nov
  18. HYDROLANT 2391/99 · Exercises1999-11-09 → 1999-11-12
    Hazardous operations 101920Z to 110035Z nov, alternate 112350Z to 120505Z nov in areas: a. bound by 29-08N…
  19. NAVAREA IV 378/99 · Exercises1999-11-09 → 1999-11-12
    Hazardous operations 101920Z to 110035Z nov, alternate 112350Z to 120505Z nov in areas: a. bound by 29-08N…
  20. HYDROLANT 2385/99 · Derelicts1999-11-08 → 1999-11-15
    Derelict M/V aggilikin p adrift in 32-43S 032-43W at 071145Z nov

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