South Atlantic Ocean

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

in force
21
last 12 months
122
since 1975
17,967
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 aids1,96511%
Exercises1,95111%
Incidents1,5909%
Quakes5833%
Derelicts4683%
Other2691%
Missiles1971%
Wrecks1351%
Debris730%
Restricted660%
Structures600%
Containers380%
Piracy130%
Towing120%
Spills50%
Mines50%
Ordnance10%
War risk10%

Archive · 17,946 cancelled

  1. HYDROLANT 1465/01 · Cable ops2001-05-21 → 2001-05-24
    Seismic survey in progress until 23 may by M/V cgg harmattan towing six 6000 meter long cables in area bound…
  2. HYDROLANT 1453/01 · Surveys2001-05-19 → 2001-05-21
    Underwater operations in progress until 211200Z may by M/V skandi hav along trackline joining 03-40.0S…
  3. HYDROLANT 1452/01 · Cable ops2001-05-19 → 2001-05-22
    Seismic survey in progress until 21 may by M/V ramform vanguard and M/V sanco sea towing eight 6500 meter…
  4. HYDROLANT 1449/01 · Nav aids2001-05-18 → 2001-06-02
    Itariri light 11-57.3S 037-37.3W unreliable
  5. HYDROLANT 1446/01 · Nav aids2001-05-18 → 2001-05-19
    Cabo de santo agostinho light 08-21.1S 034-56.9W unlit
  6. HYDROLANT 1445/01 · Nav aids2001-05-18 → 2001-05-18
    Itariri light 11-57.3S 037-37.3W unlit
  7. HYDROLANT 1444/01 · Cable ops2001-05-18 → 2001-05-21
    Seismic survey in progress until 20 may by M/V geco tau towing 11000 meter long cable along trackline…
  8. HYDROLANT 1443/01 · Cable ops2001-05-18 → 2001-05-21
    Seismic survey in progress until 20 may by M/V cgg harmattan towing six 6000 meter long cables in area bound…
  9. HYDROLANT 1440/01 · Derelicts2001-05-17 → 2001-05-24
    Derelict F/V ying jen adrift vicinity 02-14S 029-34W
  10. HYDROLANT 1435/01 · Nav aids2001-05-17 → 2001-05-25
    Radiobeacon, dgps station, and RACON at calcanhar light 05-09.66S 035-29.20W inoperative until 24 may
  11. HYDROLANT 1428/01 · Cable ops2001-05-17 → 2001-05-21
    Seismic survey by M/V northern access towing 4800 meter long cable: a. 17 may in area bound by 27-04S…
  12. HYDROLANT 1427/01 · Exercises2001-05-17 → 2001-05-22
    Hazardous operations 221600Z to 222100Z may in area bound by 05-54.0S 035-11.0W, 05-56.0S 035-11.0W,…
  13. HYDROLANT 1419/01 · Cable ops2001-05-16 → 2001-05-19
    Seismic survey in progress until 18 may by M/V ramform vanguard and M/V sanco sea towing eight 6500 meter…
  14. HYDROLANT 1409/01 · Surveys2001-05-15 → 2001-05-19
    Underwater operations in progress until 190001Z may by M/V skandi hav in area bound by 03-24S 038-00W,…
  15. HYDROLANT 1408/01 · Cable ops2001-05-15 → 2001-05-16
    Seismic survey in progress until 15 may by M/V ramform vanguard and M/V sanco sea towing eight 6500 meter…
  16. HYDROLANT 1407/01 · Icebergs2001-05-15 → 2001-05-22
    Very large icebergs reported on 11 may: a. A-22C, three miles by 14 miles, in 55-18S 014-30W
  17. HYDROLANT 1397/01 · Exercises2001-05-14 → 2001-05-16
    Hazardous operations 141940Z to 150300Z may, alternate 151940Z to 160300Z may in area bound by 06-42S…
  18. HYDROLANT 1389/01 · Cable ops2001-05-13 → 2001-05-18
    Seismic survey in progress until 17 may by M/V cgg harmattan towing six 6000 meter long cables in area bound…
  19. HYDROLANT 1388/01 · Cable ops2001-05-13 → 2001-05-18
    Seismic survey in progress until 17 may by M/V geco tau towing 11000 meter long cable along trackline…
  20. HYDROLANT 1387/01 · Exercises2001-05-13 → 2001-05-14
    Hazardous operations 141940Z to 150100Z may, alternate 151940Z to 160100Z may in area bound by 06-42S…

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