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 2049/02 · Cable ops2002-09-14 → 2002-09-16
    Seismic survey in progress until 170259Z sep by M/V veritas viking I towing six 6000 meter long cables in…
  2. HYDROLANT 2048/02 · Cable ops2002-09-14 → 2002-09-17
    Seismic survey in progress until 16 sep by M/V bulldog towing two 15 meter long cables in area bound by…
  3. HYDROLANT 2039/02 · Surveys2002-09-13 → 2002-09-25
    Oceanographic operations 14 thru 24 sep by M/V antares in area bound by 31-19S 050-45W, 33-00S 047-35W,…
  4. HYDROLANT 2037/02 · Incidents2002-09-12 → 2002-10-26
    Distress signal received on 2187.5 khz in 27-29S 005-43E at 121656Z sep
  5. HYDROLANT 2030/02 · Cable ops2002-09-12 → 2002-09-15
    Seismic survey in progress until 14 sep by M/V ramform explorer towing eight 6853 meter long cables in area…
  6. HYDROLANT 2024/02 · Cable ops2002-09-11 → 2002-09-14
    Seismic survey in progress until 140300Z sep by M/V veritas viking I towing six 6000 meter long cables in…
  7. HYDROLANT 2022/02 · Cable ops2002-09-11 → 2002-09-14
    Seismic survey in progress until 140300Z sep by M/V veritas viking II towing six 6500 meter long cables in…
  8. HYDROLANT 2020/02 · Cable ops2002-09-11 → 2002-09-14
    Seismic survey in progress until 13 sep by M/V bulldog towing two 15 meter long cables in area bound by…
  9. HYDROLANT 2019/02 · Exercises2002-09-11 → 2002-09-13
    Hazardous operations 0900Z to 1700Z daily 11 thru 13 sep within two miles of 02-19S 044-22W
  10. HYDROLANT 2018/02 · Incidents2002-09-10 → 2002-09-25
    Man overboard vicinity 23-09.1S 043-32.3W at 100001Z sep
  11. HYDROPAC 1654/02 · Icebergs2002-09-10 → 2002-09-17
    Icebergs reported on 08 sep: a. A-43B, 13 miles by 14 miles in 59-12S 050-12W
  12. HYDROLANT 2015/02 · Icebergs2002-09-10 → 2002-09-17
    Icebergs reported on 08 sep: a. A-43B, 13 miles by 14 miles in 59-12S 050-12W
  13. HYDROLANT 2000/02 · Cable ops2002-09-08 → 2002-09-11
    Seismic survey in progress until 10 sep by M/V bulldog towing two 15 meter long cables in area bound by…
  14. HYDROLANT 1999/02 · Cable ops2002-09-08 → 2002-09-12
    Seismic survey 09 thru 11 sep by M/V ramform explorer towing eight 6853 meter long cables in area bound by…
  15. HYDROLANT 1994/02 · Cable ops2002-09-07 → 2002-09-11
    Seismic survey in progress until 110300Z sep by M/V veritas viking I towing six 6000 meter long cables in…
  16. HYDROLANT 1992/02 · Cable ops2002-09-07 → 2002-09-11
    Seismic survey in progress until 110300Z sep by M/V veritas viking II towing six 6500 meter long cables in…
  17. HYDROLANT 1991/02 · Derelicts2002-09-07 → 2002-09-07
    Derelict F/V sirius III adrift in 45-41S 062-03W
  18. HYDROLANT 1980/02 · Cable ops2002-09-06 → 2002-09-09
    Seismic survey in progress until 08 sep by M/V ramform explorer towing eight 6853 meter long cables in area…
  19. HYDROLANT 1979/02 · Cable ops2002-09-06 → 2002-09-08
    Seismic survey in progress until 07 sep by M/V bulldog towing two 15 meter long cables in area bound by…
  20. HYDROLANT 1974/02 · Cable ops2002-09-05 → 2002-09-06
    Seismic survey in progress until 07 sep by M/V bulldog in area bound by 04-42S 036-57W, 04-42S 036-56W,…

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