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 52/06 · Nav aids2006-01-10 → 2006-01-10
    Karratha dgps station 20-42.4S 116-47.0E unreliable
  2. HYDROPAC 2214/05 · Surveys2005-12-25 → 2005-12-26
    Survey operations in progress until further notice by M/V markab in 19-29S 116-35E
  3. HYDROPAC 2193/05 · Icebergs2005-12-23 → 2005-12-26
    Very large iceberg A-43E, 10 miles by 14 miles, detected in 53-25S 028-43E on 19 dec
  4. HYDROPAC 2151/05 · Surveys2005-12-18 → 2005-12-25
    Survey operations in progress until further notice by M/V markab vicinity 19-59S 115-19E
  5. HYDROPAC 2149/05 · Nav aids2005-12-17 → 2005-12-18
    Rottnest island light 32-00.5S 115-30.1E unlit
  6. HYDROPAC 2148/05 · Surveys2005-12-17 → 2005-12-18
    Survey operations in progress until further notice by M/V markab vicinity 19-58S 115-17E
  7. HYDROPAC 2103/05 · Nav aids2005-12-10 → 2005-12-11
    Karratha dgps station 20-42.4S 116-47.0E inoperative
  8. HYDROPAC 2086/05 · Surveys2005-12-08 → 2005-12-11
    Survey operations in progress until further notice by M/V markab vicinity 20-00S 115-23E
  9. HYDROPAC 2081/05 · Surveys2005-12-07 → 2005-12-09
    Survey operations 080400Z to 092000Z dec by M/V discovery vicinity 44-30S 050-00E
  10. HYDROPAC 2076/05 · Surveys2005-12-07 → 2005-12-08
    Survey operations in progress until further notice by M/V markab vicinity 19-30S 116-36E
  11. HYDROPAC 2053/05 · Surveys2005-12-06 → 2005-12-07
    Survey operations in progress until further notice by M/V markab in 20-00S 115-23E
  12. HYDROPAC 1999/05 · Surveys2005-11-28 → 2005-12-06
    Survey operations in progress until further notice by M/V markab in 19-57S 115-16E
  13. HYDROPAC 1995/05 · Derelicts2005-11-26 → 2005-12-03
    Derelict 12.5 meter S/V star's memory adrift in 39-35-20S 055-00-38E
  14. HYDROPAC 1937/05 · Piracy2005-11-19 → 2005-11-19
    M/V ALEXANDRA1 reports act of piracy/armed robbery in 29-25S 048-22E at 192215Z nov
  15. HYDROPAC 1878/05 · Nav aids2005-11-09 → 2005-11-14
    North west cape light 21-49S 114-08E unlit
  16. HYDROPAC 1855/05 · Derelicts2005-11-04 → 2005-11-04
    Derelict S/V adrift in 39-44S 022-12E
  17. HYDROLANT 2016/05 · Derelicts2005-11-04 → 2005-11-11
    Derelict S/V adrift in 39-44S 022-12E
  18. HYDROPAC 1836/05 · Cable ops2005-11-01 → 2005-12-05
    Seismic survey in progress until further notice by M/V ramform victory towing 12 3.5 mile long cables in…
  19. HYDROPAC 1835/05 · Icebergs2005-11-01 → 2005-11-08
    Very large iceberg C-20, 11 by 15 miles, detected in 55-19S 079-54E on 22 oct
  20. HYDROPAC 1823/05 · Other2005-10-29 → 2005-12-14
    F/V nikko maru reports crewman with suspected intercranial bleeding in 34-51.2S 041-16.1E

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