South Atlantic Ocean

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

in force
26
last 12 months
85
since 1997
15,958
categories
14

In force now · 26

  1. HYDROLANT 1462/26 · Exercises2026-07-29
    Hazardous operations are occurring off Brazil in a bounded area from August 3 through September 11.
  2. 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.
  3. HYDROLANT 1407/26 · Nav aids2026-07-22
    The radiobeacon at Chui Light, Brazil, is off air until 17 Jan 27.
  4. 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.
  5. 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.
  6. 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.
  7. HYDROLANT 1021/26 · Surveys2026-05-27
    Survey operations continue until August 31, 2200 UTC in the South Atlantic off Brazil; wide berth requested.
  8. HYDROLANT 985/26 · Surveys2026-05-21
    Underwater operations by vessel Fugro Vaquita continue until August 31st in the South Atlantic off Brazil, wide berth requested.
  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 809/26 · Nav aids2026-04-23
    An ODAS buoy is temporarily established in the South Atlantic off Brazil at 32-32.46S 052-06.03W until 31 Dec 2027; HYDROLANT 1946/25 canceled.
  15. HYDROLANT 657/26 · Nav aids2026-04-02
    Radar beacon at Cabo Sao Tome light is off air until 28 Sep.
  16. 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.
  17. 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.
  18. HYDROLANT 627/26 · Nav aids2026-03-30
    Light at Laje da Conceicao, 24-14.18S 046-41.46W, is unlit until 24 September.
  19. HYDROLANT 582/26 · Wrecks2026-03-23
    Foul ground exists in a bounded area off Brazil until December 6, 2027.
  20. HYDROLANT 492/26 · Nav aids2026-03-13
    Barra de Itabapoana light is unlit until 08 September 2026; previous warnings cancelled.
  21. HYDROLANT 453/26 · Nav aids2026-03-07
    Caete Light at 00-49S 046-36W is destroyed; message cancels on September 3, 2026.
  22. HYDROLANT 434/26 · Nav aids2026-03-05
    Ponta da Galheta light at 27-34.55S 048-24.99W is unlit until 31 August. Cancellation on 1 September 2026.
  23. HYDROLANT 397/26 · Surveys2026-02-27
    A yellow scientific buoy flashing every 20 seconds is established at 27-24.38S 047-15.92W off Brazil until 25 August.
  24. 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.
  25. HYDROLANT 1213/25 · Wrecks2025-07-19
    Depths are less than charted in three areas off Brazil in the South Atlantic.
  26. 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 397/26 · Surveys2026-02-27
    A yellow scientific buoy flashing every 20 seconds is established at 27-24.38S 047-15.92W off Brazil until 25 August.
  5. HYDROLANT 434/26 · Nav aids2026-03-05
    Ponta da Galheta light at 27-34.55S 048-24.99W is unlit until 31 August. Cancellation on 1 September 2026.

By year

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 ops5,17232%
Icebergs3,05119%
Surveys2,30314%
Nav aids1,96212%
Exercises1,95112%
Other6004%
Derelicts4703%
Missiles1971%
Wrecks1351%
Debris490%
Containers380%
Piracy130%
Towing120%
Mines50%

Archive · 15,932 cancelled

  1. HYDROLANT 1978/08 · Exercises2008-11-16 → 2008-11-18
    Hazardous operations 180800Z to 181900Z nov in areas bound by: a. 24-35S 043-33W, 24-35S 044-23W, 25-14S…
  2. HYDROLANT 1975/08 · Icebergs2008-11-15 → 2008-11-22
    Icebergs reported at 150907Z nov vicinity: a. 53-17S 041-17W
  3. HYDROLANT 1974/08 · Cable ops2008-11-15 → 2008-11-22
    Two 8000 meter long seismic survey cables adrift in 24-54S 042-28W at 150130Z nov
  4. HYDROLANT 1972/08 · Other2008-11-15 → 2008-11-19
    F/V tafira reports crewman requiring medical assistance in 32-20S 034-02W at 141330Z nov
  5. HYDROLANT 1959/08 · Exercises2008-11-14 → 2008-11-19
    Hazardous operations 182000Z to 190500Z nov in area bound by 25-42S 045-17W, 24-47S 044-13W, 25-17S 043-42W,…
  6. HYDROLANT 1957/08 · Nav aids2008-11-14 → 2008-11-15
    Nga chart 24008 (42ND ed)
  7. HYDROLANT 1955/08 · Exercises2008-11-14 → 2008-11-20
    Hazardous operations 192200Z to 200200Z nov within 20 miles of 28-06S 047-32W
  8. HYDROLANT 1954/08 · Exercises2008-11-14 → 2008-11-19
    Hazardous operations 190900Z to 191500Z nov within 25 miles of 25-28S 044-21W
  9. HYDROLANT 1952/08 · Cable ops2008-11-13 → 2008-11-20
    3500 meter long seismic survey cable adrift vicinity 26-07S 040-25W at 120610Z nov
  10. HYDROLANT 1946/08 · Cable ops2008-11-13 → 2008-11-20
    Seismic survey 130300Z to 200259Z nov by M/V ramform valiant towing 12 6500 meter long cables in area bound…
  11. HYDROLANT 1945/08 · Cable ops2008-11-13 → 2008-11-27
    Seismic survey 130259Z nov to 130259Z dec by M/V ramform sovereign towing 14 8100 meter long cables in area…
  12. HYDROLANT 1944/08 · Cable ops2008-11-13 → 2008-11-17
    Seismic survey by M/V discoverer in progress until 16 nov in area bound by 26-23S 044-08W, 26-23S 044-00W,…
  13. HYDROPAC 2229/08 · Icebergs2008-11-12 → 2008-11-19
    Icebergs reported on 11 nov: a. A43K, 56-54S 032-06W
  14. HYDROLANT 1942/08 · Icebergs2008-11-12 → 2008-11-18
    Icebergs reported on 11 nov: a. A43K, 56-54S 032-06W
  15. HYDROLANT 1938/08 · Cable ops2008-11-12 → 2008-11-13
    Seismic survey by M/V discoverer in progress until 12 nov in area bound by 28-20S 046-21W, 28-23S 046-15W,…
  16. HYDROLANT 1937/08 · Exercises2008-11-12 → 2008-11-17
    Hazardous operations 171500Z to 171900Z nov within 10 miles of 14-46S 038-38W
  17. HYDROLANT 1933/08 · Exercises2008-11-11 → 2008-12-13
    Gunnery exercises 16 nov thru 12 dec: a. in area bound by 05-42.53S 034-45.02W, 06-09.83S 034-46.82W,…
  18. HYDROLANT 1925/08 · Nav aids2008-11-09 → 2008-11-12
    Nga chart 24160 (21ST ed)
  19. HYDROLANT 1922/08 · Exercises2008-11-09 → 2008-11-14
    Gunnery exercises 141000Z to 141900Z nov within 20 miles of 03-24.6S 037-44.8W
  20. HYDROLANT 1921/08 · Cable ops2008-11-09 → 2008-11-12
    Seismic survey by M/V discoverer: a. in progress in area bound by 28-56S 046-00W, 28-56S 045-55W, 31-32S…

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