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 1381/08 · Exercises2008-08-28 → 2008-08-29
    Hazardous operations 281100Z to 282100Z and 291000Z to 291800Z aug in area bound by 23-27S 043-52W, 23-30S…
  2. HYDROLANT 1369/08 · Exercises2008-08-23 → 2008-08-29
    Hazardous operations 1200Z to 1900Z daily 28 and 29 aug within 2.5 miles of 02-17S 044-21W
  3. HYDROLANT 1362/08 · Nav aids2008-08-22 → 2008-08-30
    Nga chart 24230 (20TH ed)
  4. HYDROLANT 1356/08 · Exercises2008-08-20 → 2008-08-25
    Gunnery exercises 251600Z to 252000Z aug in area bound by 09-21.00S 035-04.00W, 09-12.00S 034-59.50W,…
  5. HYDROLANT 1354/08 · Nav aids2008-08-20 → 2013-11-09
    Nga chart 24290 (3RD ed)
  6. HYDROLANT 1351/08 · Cable ops2008-08-19 → 2008-09-06
    Pipe laying operations 211100Z aug to 222100Z sep by M/V polar bjorn along trackline joining 23-49.42S…
  7. HYDROLANT 1350/08 · Cable ops2008-08-19 → 2008-09-06
    Pipe laying operations 190300Z aug T0 150300Z oct by barge acergy piper along trackline between 23-49.9S…
  8. HYDROLANT 1347/08 · Other2008-08-19 → 2008-08-23
    F/V fenix goncalense IV reports crewman requiring medical assistance in 23-29.72S 044-15.18W at 182243Z aug
  9. HYDROLANT 1338/08 · Nav aids2008-08-16 → 2008-10-07
    Nga chart 24290 (3RD ed)
  10. HYDROLANT 1337/08 · Cable ops2008-08-16 → 2008-08-23
    Seismic survey 180300Z to 230259Z aug by M/V rig supporter in area bound by 23-26S 041-17W, 23-26S 041-11W,…
  11. HYDROLANT 1329/08 · Nav aids2008-08-14 → 2008-08-22
    Nga chart 24150 (27TH ed)
  12. HYDROLANT 1322/08 · Surveys2008-08-13 → 2008-08-23
    Survey operations by M/V amorim do valle: a. 18 aug vicinity 20-20.34S 040-07.01W
  13. HYDROLANT 1319/08 · Nav aids2008-08-12 → 2008-08-14
    Nga chart 24170 (14TH ed)
  14. HYDROLANT 1304/08 · Exercises2008-08-08 → 2008-08-14
    Hazardous operations 1544Z to 2205Z daily 12 aug thru 12 sep in area bound by 00-44S 000-25E, 02-31S…
  15. HYDROLANT 1284/08 · Surveys2008-08-05 → 2008-08-13
    Underwater operations 02 thru 12 aug within 500 meters of: a. 19-33.83S 039-15.22W
  16. HYDROLANT 1278/08 · Surveys2008-08-04 → 2008-08-05
    Underwater operations by divers 02 thru 12 aug in area bound by 19-33.83S 039-15.22W, 19-33.23S 039-22.33W,…
  17. HYDROLANT 1277/08 · Cable ops2008-08-04 → 2008-08-05
    Seismic survey in progress by M/V rig supporter until 050259Z aug in area bound by 24-18.30S 044-27.40W,…
  18. HYDROLANT 1274/08 · Exercises2008-08-04 → 2008-08-08
    Hazardous operations 0930Z to 2100Z daily 05 thru 08 aug in area bound by 22-58.72S 042-02.15W, 23-01.00S…
  19. HYDROLANT 1246/08 · Exercises2008-07-30 → 2008-08-04
    Gunnery exercises 041200Z to 041800Z aug within ten miles of 14-29S 038-20W
  20. HYDROLANT 1232/08 · Cable ops2008-07-26 → 2008-08-01
    Seismic survey 270300Z jul to 010259Z aug by M/V rig supporter with submersible in area bound by 24-18.3S…

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