Indian Ocean

IHO sea area 45 · 20° to 147° E, -60° to 10° N

in force
21
last 12 months
56
since 1997
3,589
categories
15

In force now · 21

  1. NAVAREA X 96/26 · Missiles2026-08-20
    Space debris danger area 100 nautical miles either side of a line in the Southern Ocean from Cape Darnley to Tasmania, daily 25-31 August 2026 0809-1608 UTC.
  2. AUSCOAST 279/26 · Surveys2026-08-19
    Special purpose vessel Fugro Kwilena is conducting underwater operations in area from 19-47.68S 115-12.91E to 19-57.87S 115-25.37E, requesting 1.5 nautical mile clearance.
  3. AUSCOAST 275/26 · Surveys2026-08-16
    Drill rig Transocean Endurance is at position 19-31.18S 116-06.65E, requesting 2.5 nautical miles clearance.
  4. HYDROPAC 2330/26 · Nav aids2026-08-14
    Four yellow buoys with flashing yellow light every 5 seconds established near 29-27.00S 114-52.18E.
  5. AUSCOAST 273/26 · Nav aids2026-08-14
    Four yellow surface buoys with flashing yellow light every 5 seconds established within 0.3 nautical miles of 29-27.00S 114-52.18E.
  6. HYDROPAC 2327/26 · Missiles2026-08-13
    Space debris hazard operations in the Indian Ocean from August 16 to 23, daily 0148Z to 0429Z, between 23S-38S and 058E-074E.
  7. HYDROPAC 2323/26 · Cable ops2026-08-13
    Cable operations by vessel Rebecca continue until 15 September in eastern Indian Ocean off Sri Lanka; wide berth requested.
  8. HYDROPAC 2288/26 · Surveys2026-08-10
    Underwater operations are in progress by vessel VE Constructor in an area off Australia, bounded by 19-12S to 19-21S and 116-30E to 116-50E, requesting one mile berth.
  9. AUSCOAST 270/26 · Surveys2026-08-10
    Special purpose vessel VE Constructor conducting underwater operations in area bounded by 19-12S to 19-21S and 116-30E to 116-50E, 0.5 nautical miles clearance requested.
  10. HYDROPAC 2302/26 · Missiles2026-08-08
    Space debris operations in the Indian Ocean from Aug 16 to 22 in an area near 25S 58E to 37S 71E.
  11. AUSCOAST 267/26 · Surveys2026-08-05
    Drill rig JANSZ is at position 19-52.73S 114-36.50E, requesting a 2.5 nautical mile clearance.
  12. HYDROPAC 2235/26 · Missiles2026-08-02
    Space debris hazard operations are scheduled in the Eastern Indian Ocean and South Pacific on August 10-16, 2026, during specific time windows.
  13. HYDROPAC 2203/26 · Surveys2026-08-01
    Underwater operations by the vessel Bhagwan Dryden at 20-06.96S 116-26.11E in the Eastern Indian Ocean, Australia, request a three-mile berth.
  14. AUSCOAST 260/26 · Surveys2026-08-01
    Special purpose vessel Bhagwan Dryden is conducting underwater operations at position 20-06.96S 116-26.11E, requesting 2.5 nautical miles clearance.
  15. HYDROPAC 2115/26 · Nav aids2026-07-24
    Cliff Head platform at 29-26.99S 114-52.18E is unlit; the Hydropac warning 2088/26 is canceled.
  16. AUSCOAST 253/26 · Nav aids2026-07-24
    Cliff Head Platform light in position 29-26.99S 114-52.18E is unlit.
  17. HYDROPAC 1015/26 · Other2026-04-04
    A flashing white mooring buoy in the eastern Indian Ocean near Australia is semi-submerged at 20-16.32S 116-16.58E.
  18. AUSCOAST 130/26 · Other2026-04-04
    A semi-submerged mooring light buoy with a flashing white light is at position 20-16.32S 116-16.58E.
  19. HYDROPAC 957/26 · Surveys2026-03-29
    Underwater operations are in progress by vessel Safe Boreas in the eastern Indian Ocean off Australia, within 12-54.90S 124-25.10E to 12-59.90S 124-35.10E.
  20. AUSCOAST 120/26 · Surveys2026-03-29
    Special purpose vessel Safe Boreas is supporting underwater operations in a bounded area; 2.5 nautical mile clearance requested.
  21. HYDROPAC 363/24 · Other2024-01-30
    At 21-06.00S 055-36.00E, MRCC La Réunion is unable to receive MF and HF transmissions; for assistance contact them at 2622 6243 4343 or [email protected].

Longest in force

  1. HYDROPAC 363/24 · Other2024-01-30
    At 21-06.00S 055-36.00E, MRCC La Réunion is unable to receive MF and HF transmissions; for assistance contact them at 2622 6243 4343 or [email protected].
  2. AUSCOAST 120/26 · Surveys2026-03-29
    Special purpose vessel Safe Boreas is supporting underwater operations in a bounded area; 2.5 nautical mile clearance requested.
  3. HYDROPAC 957/26 · Surveys2026-03-29
    Underwater operations are in progress by vessel Safe Boreas in the eastern Indian Ocean off Australia, within 12-54.90S 124-25.10E to 12-59.90S 124-35.10E.
  4. AUSCOAST 130/26 · Other2026-04-04
    A semi-submerged mooring light buoy with a flashing white light is at position 20-16.32S 116-16.58E.
  5. HYDROPAC 1015/26 · Other2026-04-04
    A flashing white mooring buoy in the eastern Indian Ocean near Australia is semi-submerged at 20-16.32S 116-16.58E.

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

Derelicts62217%
Missiles56016%
Nav aids46713%
Surveys41211%
Other37610%
Exercises35710%
Piracy34110%
Cable ops1955%
Debris1093%
Icebergs822%
Wrecks371%
Containers221%
Volcanic50%
Towing30%
Mines10%

Archive · 3,568 cancelled

  1. HYDROPAC 1249/09 · Cable ops2009-07-10 → 2009-07-14
    Cable laying operations in progress until further notice by cableship chamarel along trackline joining…
  2. HYDROPAC 1201/09 · Nav aids2009-06-29 → 2009-07-04
    Nga chart 74527 (2ND ed)
  3. HYDROPAC 1092/09 · Cable ops2009-06-12 → 2009-06-17
    Cable laying operations in progress until 25 jun by cableship chamarel along trackline joining 19-55.0S…
  4. HYDROPAC 1074/09 · Nav aids2009-06-08 → 2009-06-12
    Nga chart 74020 (4TH ed)
  5. HYDROPAC 1072/09 · Cable ops2009-06-08 → 2009-06-12
    Cable laying operations in progress until further notice by cableship chamarel along trackline joining…
  6. HYDROPAC 1033/09 · Other2009-06-02 → 2009-10-24
    Pipelaying operations in progress until further notice by M/V audacia along trackline between 20-23S 116-45E…
  7. HYDROPAC 1001/09 · Other2009-05-27 → 2010-02-13
    Pipelaying operations in progress until further notice by M/V jascon 25 in 21-32S 114-07E
  8. HYDROPAC 986/09 · Cable ops2009-05-24 → 2009-07-06
    Seismic survey in progress until 05 jul by M/V aquila explorer towing 8000 meter long cable in area bound by…
  9. HYDROPAC 910/09 · Surveys2009-05-11 → 2009-07-20
    Survey operations in progress until further notice by M/V ridley thomas along trackline joining 26-26S…
  10. HYDROPAC 882/09 · Piracy2009-05-06 → 2009-05-09
    A merchant vessel reported that eight pirates in two skiffs attempted to board their vessel vicinity…
  11. HYDROPAC 865/09 · Piracy2009-05-01 → 2009-05-09
    A merchant vessel reported coming under pirate attack in 03-05S 053-19E at 010430Z may
  12. HYDROPAC 863/09 · Exercises2009-05-01 → 2009-05-11
    Gunnery exercises 0500Z to 1300Z daily 06, 07 and 11 may in area bound by 21-12.0S 054-57.0E, 21-26.0S…
  13. HYDROPAC 849/09 · Piracy2009-04-30 → 2009-05-02
    A merchant vessel reported coming under pirate attack in 07-46S 051-32E at 300400Z apr approximately 680…
  14. HYDROPAC 814/09 · Surveys2009-04-24 → 2009-04-30
    Underwater operations in progress until further notice by M/V southern supporter vicinity 19-16.60S 116-36.70E
  15. HYDROPAC 765/09 · Derelicts2009-04-16 → 2009-04-23
    Derelict M/V ile d'anjouan adrift in 09-39.96S 041-18.36E
  16. HYDROPAC 750/09 · Piracy2009-04-14 → 2009-04-17
    M/V liberty sun attacked by pirates vicinity 02-38S 046-25E at 141510Z apr
  17. HYDROPAC 714/09 · Surveys2009-04-10 → 2009-07-28
    Drilling operations in progress until further notice by M/V markab in 19-56S 115-23E
  18. HYDROPAC 706/09 · Piracy2009-04-08 → 2009-04-18
    M/V maersk alabama, 21 crew members on board, boarded by pirates in 02-25N 051-14E at 080430Z apr
  19. HYDROPAC 689/09 · Surveys2009-04-06 → 2009-04-07
    Survey operations in progress until further notice by M/V ridley thomas in 10-30S 041-40E
  20. HYDROPAC 675/09 · Other2009-04-04 → 2009-04-04
    F/V man sheng yi reports crewman requiring medical assistance in 29-55S 088-44E at 031830Z apr

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