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 2323/02 · Icebergs2002-10-21 → 2002-10-28
    Icebergs reported: a. in area between 43-02.0S 43-32.0S and 029-31.0W 031-02.0W
  2. HYDROLANT 2320/02 · Cable ops2002-10-20 → 2002-10-22
    Seismic survey in progress until 21 oct by M/V ramform explorer towing eight 6853 meter long cables in area…
  3. HYDROLANT 2313/02 · Icebergs2002-10-19 → 2002-10-26
    Iceberg, 15 miles by three miles, reported vicinity 54-04.3S 062-22.5W
  4. HYDROLANT 2312/02 · Cable ops2002-10-19 → 2002-10-22
    Seismic survey in progress until 21 oct by M/V bulldog towing 15 meter long cable in area bound by 11-01.4S…
  5. HYDROLANT 2304/02 · Cable ops2002-10-18 → 2002-10-21
    Seismic survey in progress until 210259Z oct by M/V veritas viking I towing eight 6000 meter long cables in…
  6. HYDROLANT 2303/02 · Cable ops2002-10-18 → 2002-10-20
    Seismic survey in progress until 210259Z oct by M/V cgg harmattan towing eight 4500 meter long cables in…
  7. HYDROLANT 2301/02 · Cable ops2002-10-18 → 2002-10-20
    Seismic survey in progress until 19 oct by M/V ramform explorer towing eight 6853 meter long cables in area…
  8. HYDROLANT 2297/02 · Surveys2002-10-17 → 2002-11-02
    Oceanographic operations 22 oct thru 01 nov by M/V antares in area bound by 21-55S 040-38W, 24-42S 029-10W,…
  9. HYDROLANT 2296/02 · Debris2002-10-17 → 2002-10-24
    Ten meter long object adrift in 23-07S 041-35W at 161816Z oct
  10. HYDROLANT 2295/02 · Derelicts2002-10-17 → 2002-10-19
    Derelict F/V miss patagonia adrift in 45-42S 064-36W
  11. HYDROLANT 2291/02 · Exercises2002-10-16 → 2002-10-25
    Hazardous operations 0900Z to 1700Z daily 21 thru 25 oct within two miles of 02-17S 044-21W
  12. HYDROLANT 2288/02 · Other2002-10-15 → 2002-10-18
    Green flare sighted in 12-49.3S 034-32.9W at 150420Z oct
  13. HYDROLANT 2286/02 · Cable ops2002-10-15 → 2002-10-18
    Seismic survey in progress until 180259Z oct by M/V veritas viking I towing eight 6000 meter long cables in…
  14. HYDROLANT 2285/02 · Surveys2002-10-15 → 2002-10-17
    Underwater operations in progress until 200300Z oct by M/V rou 22 oyarvide in area bound by 34-45.0S…
  15. HYDROLANT 2275/02 · Cable ops2002-10-15 → 2002-10-15
    Seismic survey in progress until 180300Z oct by M/V veritas viking I towing eight 6000 meter long cables in…
  16. HYDROLANT 2271/02 · Cable ops2002-10-14 → 2002-10-15
    Seismic survey in progress until 150259Z oct by M/V cgg harmattan towing eight 4500 meter long cables in…
  17. HYDROLANT 2269/02 · Cable ops2002-10-14 → 2002-10-17
    Seismic survey in progress until 16 oct by M/V ramform explorer towing eight 6853 meter long cables in area…
  18. HYDROLANT 2263/02 · Surveys2002-10-12 → 2002-10-15
    Oceanographic operations 13 thru 20 oct by M/V almirante camara in area bound by 03-25S 037-58W, 04-33S…
  19. HYDROLANT 2261/02 · Cable ops2002-10-12 → 2002-10-15
    Seismic survey in progress until 150300Z oct by M/V veritas viking I towing eight 6000 meter long cables in…
  20. HYDROLANT 2253/02 · Cable ops2002-10-11 → 2002-10-13
    Seismic survey in progress until 130259Z oct by M/V cgg harmattan towing eight 4500 meter long cables in…

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