Indian Ocean

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

in force
23
last 12 months
22
since 1997
3,518
categories
15

In force now · 23

  1. 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.
  2. NAVAREA X 94/26 · Missiles2026-08-15
    Space debris danger area is in effect from Cape Darnely to Tasmania, daily 1525-2235 UTC, 20-26 August 2026.
  3. 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.
  4. 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.
  5. 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.
  6. 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.
  7. 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.
  8. 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.
  9. 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.
  10. 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.
  11. NAVAREA X 91/26 · Missiles2026-08-05
    Space debris danger area from Cape Darnley to Tasmania, 80 nautical miles either side of centreline, daily between 1455 and 2205 UTC, 10 to 16 August 2026.
  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 2157/26 · Surveys2026-07-27
    Underwater operations are underway by the vessel Fugro Kwilena in the eastern Indian Ocean off Australia until further notice. A two-mile berth is requested.
  16. AUSCOAST 255/26 · Surveys2026-07-27
    Vessel Fugro Kwilena is conducting underwater operations in an area bounded by 19-56.69 S to 20-26.06 S and 114-45.09 E to 115-30.10 E, requesting 1.5 nautical miles clearance.
  17. 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.
  18. AUSCOAST 253/26 · Nav aids2026-07-24
    Cliff Head Platform light in position 29-26.99S 114-52.18E is unlit.
  19. 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.
  20. AUSCOAST 130/26 · Other2026-04-04
    Semi-submerged mooring lightbuoy fl.w in position 20-16.32S 116-16.58E
  21. 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.
  22. 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.
  23. 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
    Semi-submerged mooring lightbuoy fl.w in 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
26

By month (all years)

J
F
M
A
M
J
J
A
S
O
N
D

By category · since 1997

Derelicts62118%
Missiles54215%
Nav aids46113%
Surveys37711%
Other37611%
Exercises35310%
Piracy34010%
Cable ops1915%
Debris1093%
Icebergs822%
Wrecks351%
Containers221%
Volcanic50%
Towing30%
Mines10%

Archive · 3,495 cancelled

  1. HYDROPAC 3284/22 · Surveys2022-11-18 → 2023-04-01
    Two underwater gliders operating until further notice in area bound by 11-38.00S 118-24.00E, 11-38.00S…
  2. HYDROPAC 3280/22 · Wrecks2022-11-18 → 2022-11-28
    S/V asteri sank in 39-06.70S 032-44.10E
  3. HYDROPAC 3273/22 · Other2022-11-18 → 2022-11-18
    S/V asteria requesting assistance in 39-06.70S 032-46.60E
  4. HYDROPAC 3271/22 · Other2022-11-18 → 2022-11-18
    S/V asteria requesting assistance in 39-06.70S 032-44.10E
  5. HYDROPAC 3188/22 · Nav aids2022-11-11 → 2023-01-12
    12 six meter buoys, yellow, fl w 3 sec, established in area within one mile of 20-23.27S 116-09.19E
  6. HYDROPAC 3137/22 · Derelicts2022-11-06 → 2022-11-09
    Derelict vessel adrift in vicinity 06-27.53S 091-55.63E at 060557Z nov
  7. HYDROPAC 3116/22 · Exercises2022-11-05 → 2022-11-08
    Gunnery exercises 080900Z to 081300Z nov in area bound by 21-26.00S 055-02.50E, 21-12.00S 054-57.00E,…
  8. HYDROPAC 3109/22 · Exercises2022-11-04 → 2022-11-08
    Gunnery exercises 080900Z to 081300Z nov in area bound by 21-12.00S 054-57.00E, 21-19.50S 054-25.90E,…
  9. HYDROPAC 3058/22 · Derelicts2022-10-30 → 2022-11-02
    Derelict 13 meter F/V IMULA-0620 klt, yellow hull, adrift in 11-20.15S 046-54.16E at 301530Z oct
  10. HYDROPAC 3050/22 · Surveys2022-10-30 → 2022-11-02
    Underwater operations in progress until further notice by M/V fugro maali in area bound by 21-31.20S…
  11. HYDROPAC 3024/22 · Derelicts2022-10-28 → 2022-10-31
    Derelict 13 meter F/V imula 0620 klt, yellow hull, adrift in vicinity 11-42.66S 047-43.28E at 272100Z oct
  12. HYDROPAC 3003/22 · Surveys2022-10-26 → 2022-11-13
    Underwater operations in progress until further notice by M/V sapura constructor along trackline joining…
  13. HYDROPAC 2944/22 · Exercises2022-10-20 → 2022-10-21
    Hazardous operations 210330Z to 211530Z oct in area bound by 02-07.00N 066-47.00E, 04-03.00N 063-00.00E,…
  14. HYDROPAC 2933/22 · Missiles2022-10-19 → 2022-10-28
    Hazardous operations, rocket launching 1700Z to 2100Z daily 20 oct thru 08 nov: a. in area within ten miles…
  15. HYDROPAC 2841/22 · Other2022-10-11 → 2022-10-13
    Six meter tree partially submerged and adrift in vicinity 11-19.00S 097-11.00E at 110724Z oct
  16. HYDROPAC 2831/22 · Other2022-10-10 → 2022-10-11
    Six meter tree partially submerged and adrift in vicinity 11-31.03S 097-30.88E at 100621Z oct
  17. HYDROPAC 2822/22 · Piracy2022-10-09 → 2022-10-12
    Vessel attacked in 02-45.00N 081-04.00E at 090534Z oct
  18. HYDROPAC 2819/22 · Exercises2022-10-08 → 2022-10-09
    Hazardous operations 131100Z to 131500Z oct in area within two miles of 04-56.00N 052-05.00E
  19. HYDROPAC 2791/22 · Derelicts2022-10-06 → 2022-10-08
    S/V mahana, yellow hull, one person on board, disabled and adrift due to dismasting and engine failure in…
  20. HYDROPAC 2754/22 · Nav aids2022-10-03 → 2022-10-04
    Port hedland light 20-04.54S 118-25.63E unlit

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