Indian Ocean

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

in force
23
last 12 months
22
since 1997
3,517
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%
Other37511%
Exercises35310%
Piracy34010%
Cable ops1915%
Debris1093%
Icebergs822%
Wrecks351%
Containers221%
Volcanic50%
Towing30%
Mines10%

Archive · 3,494 cancelled

  1. HYDROPAC 332/24 · Piracy2024-01-28 → 2024-01-31
    F/V lorenzo putha 4 hijacked in 00-35.00N 061-19.00E at 270330Z jan
  2. HYDROPAC 330/24 · Piracy2024-01-27 → 2024-01-30
    F/V hijacked in 00-35.00N 061-19.00E
  3. HYDROPAC 325/24 · Other2024-01-27 → 2024-03-21
    Platform established safety zone established 01 feb in vicinity of crux platform navigation prohibited…
  4. HYDROPAC 300/24 · Missiles2024-01-25 → 2024-02-04
    Hazardous operations, space debris 2230Z to 0531Z daily 29 jan thru 04 feb in area bound by 08-53.00S…
  5. HYDROLANT 188/24 · Missiles2024-01-25 → 2024-02-04
    Hazardous operations, space debris 2230Z to 0531Z daily 29 jan thru 04 feb in area bound by 08-53.00S…
  6. HYDROPAC 298/24 · Surveys2024-01-25 → 2024-02-07
    Underwater operations in progress until further notice by M/V skandi singapore in 20-29.50S 114-54.00E
  7. HYDROPAC 262/24 · Surveys2024-01-22 → 2024-02-23
    Survey operations in progress until further notice by M/V samson explorer towing 900 meter long cables in…
  8. HYDROPAC 251/24 · Exercises2024-01-20 → 2024-01-23
    Gunnery exercises 230600Z to 231600Z jan in area bound by 21-12.0S 054-57.0E, 21-19.5S 054-25.9E, 21-39.0S…
  9. HYDROPAC 250/24 · Cable ops2024-01-20 → 2024-02-08
    Pipeline operations in progress until further notice by M/V castorone along trackline joining 20-17.00S…
  10. HYDROPAC 234/24 · Missiles2024-01-19 → 2024-01-23
    Hazardous operations, space debris 230300Z to 230900Z jan in area bound by 12-05.00S 092-27.00E, 12-01.00S…
  11. HYDROPAC 228/24 · Exercises2024-01-19 → 2024-01-20
    Gunnery exercises 230600Z to 231600Z jan in area bound by 21-12.00S 054-57.00E, 21-19.50S 054-25.90E,…
  12. HYDROPAC 210/24 · Surveys2024-01-18 → 2024-01-31
    Underwater operations in progress until further notice by M/V deep orient in area bound by 21-08.46S…
  13. HYDROPAC 207/24 · Nav aids2024-01-17 → 2024-02-21
    Cape naturaliste light 33-32.24S 115-01.12E unlit
  14. HYDROPAC 188/24 · Other2024-01-16 → 2026-08-14
    MRCC La Reunion at 21-06.00S 055-36.00E is unable to receive medium and high frequency transmissions; contact by phone or email.
  15. HYDROPAC 175/24 · Surveys2024-01-16 → 2024-01-18
    Underwater operations in progress until further notice by M/V seven oceanic in area bound by 19-44.30S…
  16. HYDROPAC 155/24 · Piracy2024-01-14 → 2024-01-17
    Two fishing vessels hijacked in 08-19.00N 050-10.00E on 12 jan
  17. HYDROPAC 150/24 · Other2024-01-13 → 2024-02-02
    F/V cap sainte marie reports crewman requiring medical assistance in 00-06.25N 065-53.24E
  18. HYDROPAC 147/24 · Surveys2024-01-13 → 2024-01-20
    Underwater operations in progress until further notice by M/V castorone along trackline joining 20-18.50S…
  19. HYDROPAC 118/24 · Nav aids2024-01-11 → 2024-01-16
    Cape naturaliste light 33-32.24S 115-01.12E unreliable
  20. HYDROPAC 102/24 · Missiles2024-01-09 → 2024-01-11
    Hazardous operations, space debris 110200Z to 110800Z jan in area bound by 02-25.00S 093-23.00E, 02-19.00S…

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