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 276/22 · Nav aids2022-02-03 → 2022-07-08
    Ponta do ouro light 26-51-24S 032-53-18E unlit
  2. HYDROPAC 256/22 · Nav aids2022-01-31 → 2022-02-18
    Gantheaume point light 17-58.4S 122-10.6E unreliable
  3. HYDROPAC 173/22 · Other2022-01-21 → 2022-01-24
    Fishing net with floats adrift in vicinity 10-23.2S 103-47.8E at 210500Z jan
  4. HYDROPAC 166/22 · Icebergs2022-01-20 → 2022-01-23
    Icebergs reported in: a. 49-56S 066-55E
  5. HYDROPAC 149/22 · Other2022-01-18 → 2022-01-21
    Numerous fads with ten meter long trailing rope adrift in area within ten miles of 12-35S 122-38E at 180700…
  6. HYDROPAC 133/22 · Surveys2022-01-16 → 2022-01-22
    Survey operations in progress until further notice by M/V bgp explorer towing five mile long cable in area…
  7. HYDROPAC 79/22 · Missiles2022-01-09 → 2022-01-17
    Hazardous operations, space debris 131743Z to 131829Z jan, alternate 1743Z to 1829Z daily 14 thru 17 jan in…
  8. HYDROPAC 77/22 · Cable ops2022-01-09 → 2022-01-20
    Cable operations in progress until 19 jan along trackline joining 04-03.78S 039-42.62E, 04-04.34S 039-42.99E
  9. HYDROPAC 71/22 · Missiles2022-01-08 → 2022-01-09
    Hazardous operations, space debris 131746Z to 131833Z jan, alternate 1746Z to 1833Z daily 14 thru 17 jan in…
  10. HYDROPAC 38/22 · Surveys2022-01-05 → 2022-01-12
    Survey operations in progress until 11 jan by M/V marion dufresne in area bound by 20-53S 055-30E, 20-10S…
  11. HYDROPAC 34/22 · Nav aids2022-01-04 → 2022-01-12
    12 six meter buoys, yellow, fl w 3 sec, established in area within one mile of 19-26.1S 116-25.8E
  12. HYDROPAC 3783/21 · Derelicts2021-12-31 → 2022-01-03
    Derelict 18 meter F/V adrift in vicinity 10-20.7S 105-04.6E at 310511Z dec
  13. HYDROPAC 3774/21 · Derelicts2021-12-30 → 2022-01-02
    Derelict 18 meter F/V adrift in vicinity 10-28.9S 104-49.3E at 300834Z dec
  14. HYDROPAC 3730/21 · Surveys2021-12-25 → 2021-12-31
    Survey operations in progress until further notice by M/V bgp explorer towing five mile long cable in area…
  15. HYDROPAC 3717/21 · Icebergs2021-12-24 → 2021-12-27
    Iceberg reported in 47-40S 064-25E at 240140Z dec
  16. HYDROPAC 3713/21 · Icebergs2021-12-23 → 2021-12-26
    Iceberg reported in 47-40S 064-25E at 231944Z dec
  17. HYDROPAC 3689/21 · Wrecks2021-12-21 → 2021-12-21
    Uncharted rock reported in 16-53.06S 122-03.78E
  18. HYDROPAC 3676/21 · Derelicts2021-12-20 → 2021-12-23
    Ten meter vessel, partially submerged and adrift in 13-47.3S 123-21.3E at 192300Z dec
  19. HYDROPAC 3644/21 · Missiles2021-12-16 → 2021-12-21
    Hazardous operations, space debris 211046Z to 211120Z dec, alternate 221023Z to 221057Z, 250913Z to 250947Z,…
  20. HYDROPAC 3559/21 · Exercises2021-12-08 → 2021-12-09
    Gunnery exercises 090930Z to 091330Z dec in area bound by 21-19.30S 054-25.54E, 21-12.00S 054-57.00E,…

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