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 3217/00 · Cable ops2000-09-18 → 2000-09-20
    Seismic survey in progress until 19 sep by M/V northern access towing 8704 meter long cable in area bound by…
  2. HYDROLANT 3201/00 · Cable ops2000-09-16 → 2000-09-21
    Seismic survey in progress until 20 sep by M/V western regent and M/V kenda towing eight 4000 meter long…
  3. HYDROLANT 3200/00 · Cable ops2000-09-16 → 2000-09-19
    Seismic survey in progress until 18 sep by M/V ramform victory, M/V sanco sea and M/V falcon explorer towing…
  4. HYDROLANT 3199/00 · Cable ops2000-09-16 → 2000-09-19
    Seismic survey in progress until 18 sep by M/V ramform explorer towing eight 6500 meter long cables in area…
  5. HYDROLANT 3198/00 · Cable ops2000-09-16 → 2000-09-16
    Seismic survey in progress until 18 sep by M/V ramform victory, M/V sanco sea and M/V falcon explorer towing…
  6. HYDROLANT 3197/00 · Cable ops2000-09-16 → 2000-09-19
    Seismic survey in progress until 18 sep by M/V cgg harmattan towing 6000 meter long cable in area bound by…
  7. HYDROPAC 1374/00 · Icebergs2000-09-16 → 2000-09-23
    Large icebergs reported on 15 sep vicinity: a. 51-24S 039-18W
  8. HYDROLANT 3196/00 · Icebergs2000-09-16 → 2000-09-23
    Large icebergs reported on 15 sep vicinity: a. 51-24S 039-18W
  9. HYDROLANT 3193/00 · Cable ops2000-09-15 → 2000-09-16
    Seismic survey in progress until 15 sep by M/V ramform explorer towing eight 6500 meter long cables in area…
  10. HYDROLANT 3174/00 · Cable ops2000-09-14 → 2000-09-18
    Seismic survey in progress until 17 sep by M/V northern access towing 8704 meter long cable in area bound by…
  11. HYDROLANT 3166/00 · Cable ops2000-09-13 → 2000-09-16
    Seismic survey in progress until 15 sep by M/V cgg harmattan towing 6000 meter long cable in area bound by…
  12. HYDROLANT 3165/00 · Cable ops2000-09-13 → 2000-09-16
    Seismic survey in progress until 15 sep by M/V western cropaud and M/V western piranha towing cable in area…
  13. HYDROLANT 3164/00 · Other2000-09-13 → 2000-09-14
    Eight 5500 meter long cables adrift in 04-25S 036-14W on 11 sep
  14. HYDROLANT 3157/00 · Cable ops2000-09-12 → 2000-09-19
    Seismic survey in progress until 20 sep by M/V geco tau towing 8300 meter long cable in area bound by 04-38S…
  15. HYDROLANT 3156/00 · Cable ops2000-09-12 → 2000-09-16
    Seismic survey in progress until 15 sep by M/V ramform victory, M/V sanco sea and M/V falcon explorer towing…
  16. HYDROLANT 3155/00 · Cable ops2000-09-12 → 2000-09-12
    Seismic survey in progress until 14 sep by M/V ramform explorer towing eight 6500 meter long cables in area…
  17. HYDROLANT 3154/00 · Cable ops2000-09-12 → 2000-09-17
    Cable laying operations 121435Z to 170055Z sep by cableship sovereign along trackline joining 14-43S…
  18. HYDROLANT 3151/00 · Cable ops2000-09-11 → 2000-09-18
    Seismic survey in progress until 17 sep by M/V new venture towing 8500 meter long cable in area bound by…
  19. HYDROLANT 3138/00 · Cable ops2000-09-11 → 2000-09-14
    Seismic survey in progress until 13 sep by M/V northern access towing 8704 meter long cable in area bound by…
  20. USGS-USP000A01D · Quakes2000-09-10 → 2000-09-13
    Earthquake magnitude 5.5 (mwc) in 1.924S 012.961W, depth 10 km at 102137Z sep 00

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