Indian Ocean

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{{IsPartOf|Indian Ocean}}
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<div style="float:right;">
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{{infobox
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<imagemap>
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| lat=-6|lon=78
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Image:Indian-Ocean.jpg|frame|center|<center>Map of the Indian Ocean - <em>For details click on a name or an area</em></center>
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poly 399 135 477 39 460 21 461 1 338 1 333 25 [[India]]
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poly 400 137 417 121 439 142 423 156 399 139 [[Sri Lanka]]
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poly 221 59 249 14 282 41 231 82 [[Oman]]
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{{Page imagemap|clear=y}}
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poly 154 75 219 59 231 83 163 106 [[Yemen]]
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poly 159 115 219 111 151 204 147 165 188 140 157 117 [[Somalia]]
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poly 129 223 96 198 101 159 147 165 145 173 145 200 149 205 136 226 [[Kenya]]
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rect 309 188 355 209 [[Maldives]]
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rect 363 210 413 233 [[Chagos Archipelago]]
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rect 345 229 391 269 [[British Indian Ocean Territory]]
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rect 202 217 257 257 [[Seychelles]]
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poly 59 200 94 200 133 225 141 265 94 275 73 248 67 221 [[Tanzania]]
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poly 99 273 111 308 103 311 91 291 73 299 86 307 79 352 82 381 109 367 107 332 146 294 139 266 [[Mozambique]]
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rect 147 262 183 275 [[Comoros]]
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rect 154 279 186 288 [[Mayotte]]
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poly 166 302 203 275 217 304 198 377 163 380 155 339 165 305 [[Madagascar]]
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rect 251 313 306 342 [[Mauritius]]
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rect 345 318 389 343 [[Rodrigues]]
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rect 237 339 281 361 [[Reunion]]
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poly 1 385 78 354 86 400 57 451 1 451 [[South Africa]]
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rect 327 569 392 591 [[Kerguelen Islands]]
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rect 640 285 749 458 [[Australia]]
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rect 465 267 534 291 [[Cocos (Keeling) Islands]]
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rect 565 261 607 284 [[Christmas Island]]
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poly 517 149 559 177 560 189 610 188 674 165 731 205 748 205 749 263 665 267 577 295 515 151 [[Indonesia]]
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rect 560 175 600 189 [[Singapore]]
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poly 539 127 545 115 585 156 582 179 565 175 547 158 [[Malaysia]]
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poly 552 109 543 79 537 59 556 49 559 69 580 65 589 91 567 101 [[Thailand]]
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rect 463 103 503 142 [[Nicobar Islands]]
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poly 497 41 521 1 542 1 537 21 553 44 534 59 539 87 513 80 [[Burma]]
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poly 477 39 463 23 463 1 481 1 485 13 507 15 507 26 500 43 [[Bangladesh]]
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</imagemap>
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</div>
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Cruising and sailing in the Indian Ocean is a wonderful experience with all those beautiful Indian Ocean islands and atolls, many of which are remote and seldom visited.
Cruising and sailing in the Indian Ocean is a wonderful experience with all those beautiful Indian Ocean islands and atolls, many of which are remote and seldom visited.
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The ocean's volume is estimated to be 292,131,000 cubic kilometers (70,086,000 mi³). Small islands dot the continental rims. Island nations within the ocean are [[Madagascar]] (formerly Malagasy Republic), the world's fourth largest island; [[Comoros]]; [[Seychelles]]; [[Maldives]]; [[Mauritius]]; and [[Sri Lanka]]. [[Indonesia]] borders it on the east. The ocean's importance as a transit route between Asia and [[Africa]] has made it a scene of conflict. Because of its size, however, no nation had successfully dominated most of it until the early 1800s when the [[United Kingdom]] controlled much of the surrounding land. After the decline of the British Empire, the ocean has since been dominated by India and Australia.
The ocean's volume is estimated to be 292,131,000 cubic kilometers (70,086,000 mi³). Small islands dot the continental rims. Island nations within the ocean are [[Madagascar]] (formerly Malagasy Republic), the world's fourth largest island; [[Comoros]]; [[Seychelles]]; [[Maldives]]; [[Mauritius]]; and [[Sri Lanka]]. [[Indonesia]] borders it on the east. The ocean's importance as a transit route between Asia and [[Africa]] has made it a scene of conflict. Because of its size, however, no nation had successfully dominated most of it until the early 1800s when the [[United Kingdom]] controlled much of the surrounding land. After the decline of the British Empire, the ocean has since been dominated by India and Australia.
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==Navigation Charts==
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==Charts==
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; British Admiralty
; British Admiralty
: BA4070 – Indian Ocean southern part Scale 1: 10 000 000
: BA4070 – Indian Ocean southern part Scale 1: 10 000 000
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: BA3877 – Mozambique Channel northern part - 1 : 1 076 000  
: BA3877 – Mozambique Channel northern part - 1 : 1 076 000  
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==Cruiser's Radio Nets for Indian Ocean==
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==Weather==
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[[Image:North Indian Ocean piracy.jpg|thumb|350px|right|'''North Indian Ocean piracy incidences - 2010/11'''<br/>''Click on image for large, clear view''<br/>© [http://svbebe.blogspot.com/ Judy Rouse]]]
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[[Image:Piracy Indian Ocean.jpg|thumb|350px|right|'''South Indian Ocean piracy incidences - 2010/11'''<br/>''Click on image for large, clear view''<br/>© [http://svbebe.blogspot.com/ Judy Rouse]]]
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''Also see [[World MM Nets|World Cruiser's Nets]]''
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* THE IO NET - Malaysia, Thailand, N.Indian Ocean to Red Sea 0030UTC on 8188USB  - See [[HF_Radio|Cruiser's Nets]] for details
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* South Africa Maritime Mobile Net - See [[HF_Radio|Cruiser's Nets]] for details.
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* Radio Peri-Peri - See [[HF_Radio|Cruiser's Nets]] for details (Now "Silent Key"). Now operated by "Roy".
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* Maritime Mobile Net South East Asia (MMNETSEA) - See [[HF_Radio|Cruiser's Nets]] for details
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==Weather and Winds==
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====Northern Indian Ocean====
====Northern Indian Ocean====
The Indian Ocean area is generally dominated by the NE and SW monsoons, which refers to the directions of the prevailing winds.   
The Indian Ocean area is generally dominated by the NE and SW monsoons, which refers to the directions of the prevailing winds.   
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The Intertropical Convergance Zone, or ITZC or the Doldrums, is usually situated around the Equator or just south of it for most of the year. Often, in the “Belt”, one will sometimes experience days of tropical thunderstorms with dramatic lightning displays.<br>''Excerpts from [http://www.cruisingconnections.co.za/books.htm Indian Ocean Crossing Notes] - by Tony Herrick''
The Intertropical Convergance Zone, or ITZC or the Doldrums, is usually situated around the Equator or just south of it for most of the year. Often, in the “Belt”, one will sometimes experience days of tropical thunderstorms with dramatic lightning displays.<br>''Excerpts from [http://www.cruisingconnections.co.za/books.htm Indian Ocean Crossing Notes] - by Tony Herrick''
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==Currents & Tides==
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====Currents & Tides====
[[Image:Indian_Ocean_Current.jpg‎|frame|right|The Indian Ocean Currents]]
[[Image:Indian_Ocean_Current.jpg‎|frame|right|The Indian Ocean Currents]]
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==Approaches and Navigation==
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==Passages==
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{{GreenText|Any navigation notes here. If this section does not apply remove it.}}
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* [[Australia to South Africa]]
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* [[South Africa to Australia]]
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==Regional Radio Nets==
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* [[South East Asia to Red Sea]]
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* [[Red Sea to South East Asia]]
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* [[South East Asia to South Africa]]
*  
*  
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*
 
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''Also see [[World MM Nets|World Cruiser's Nets]]''.
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''Also see the'' [[Mozambique Channel]].
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==Communication==
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[[Image:North Indian Ocean piracy.jpg|thumb|350px|right|'''North Indian Ocean piracy incidences - 2010/11'''<br/>''Click on image for large, clear view''<br/>© [http://svbebe.blogspot.com/ Judy Rouse]]]
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[[Image:Piracy Indian Ocean.jpg|thumb|350px|right|'''South Indian Ocean piracy incidences - 2010/11'''<br/>''Click on image for large, clear view''<br/>© [http://svbebe.blogspot.com/ Judy Rouse]]]
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''Also see [[World MM Nets|World Cruiser's Nets]]''
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* THE IO NET - Malaysia, Thailand, N.Indian Ocean to Red Sea 0030UTC on 8188USB  - See [[HF_Radio|Cruiser's Nets]] for details
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* South Africa Maritime Mobile Net - See [[HF_Radio|Cruiser's Nets]] for details.
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* Radio Peri-Peri - See [[HF_Radio|Cruiser's Nets]] for details (Now "Silent Key"). Now operated by "Roy".
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* Maritime Mobile Net South East Asia (MMNETSEA) - See [[HF_Radio|Cruiser's Nets]] for details
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==Navigation==
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{{GreenText|Any navigation notes here. If this section does not apply remove it.}}
==Health & Security==
==Health & Security==
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==Routes/Passages To/From==
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==Friends==
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* [[Australia to South Africa]]
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* [[South Africa to Australia]]
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* [[South East Asia to Red Sea]]
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* [[Red Sea to South East Asia]]
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''Also see the'' [[Mozambique Channel]].
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==Cruiser's Friends==
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Contact details of "Cruiser's Friends" that can be contacted for local information or assistance.
Contact details of "Cruiser's Friends" that can be contacted for local information or assistance.
*  
*  
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==Forum Discussions==
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==Forums==
List links to discussion threads on [[Cruising Forums|partnering forums]]. (''see link for requirements'').
List links to discussion threads on [[Cruising Forums|partnering forums]]. (''see link for requirements'').
* [http://www.cruiserlog.com/forums/index.php?showtopic=16408 Crossing the Indian Ocean - East to West (on CruiserLog)]
* [http://www.cruiserlog.com/forums/index.php?showtopic=16408 Crossing the Indian Ocean - East to West (on CruiserLog)]
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* [http://www.cruisersforum.com/forums/tags/indian-ocean.html Indian Ocean Sailing and Cruising Discussions on Cruisers Forum]
* [http://www.cruisersforum.com/forums/tags/indian-ocean.html Indian Ocean Sailing and Cruising Discussions on Cruisers Forum]
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==External Links==
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==Links==
* {{wikipedia}}
* {{wikipedia}}
* [http://www.cruisingconnections.co.za Cruising Connections] - Durban. New & Used Charts, Cruising Guides, Pilots, flags, etc.
* [http://www.cruisingconnections.co.za Cruising Connections] - Durban. New & Used Charts, Cruising Guides, Pilots, flags, etc.
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{{GreenText|If you do not use the above link, please remove it.}}
{{GreenText|If you do not use the above link, please remove it.}}
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==Personal Notes==
 
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Personal experiences?
 
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*
 
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==Also See==
==Also See==
* [[Mozambique Channel]]
* [[Mozambique Channel]]
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{{Comments}}
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Latest revision as of 08:01, 28 December 2016

WorldIndian Ocean
Indian Ocean


IndiaSri LankaOmanYemenSomaliaKenyaMaldivesChagos ArchipelagoBritish Indian Ocean TerritorySeychellesTanzaniaMozambiqueComorosMayotteMadagascarMauritiusRodriguesReunionSouth AfricaKerguelen IslandsAustraliaCocos (Keeling) IslandsChristmas IslandIndonesiaSingaporeMalaysiaThailandNicobar IslandsBurmaBangladesh
About this image
Map of the Indian Ocean - For details click on a name or an area

Cruising and sailing in the Indian Ocean is a wonderful experience with all those beautiful Indian Ocean islands and atolls, many of which are remote and seldom visited.

The Indian Ocean is the third largest of the world's oceanic divisions, covering about 20% of the water on the Earth's surface. It is bounded on the north by Asia (including the Indian subcontinent, after which it is named); on the west by Africa; on the east by Indochina, the Sunda Islands, and Australia; and on the south by the Southern Ocean (or, traditionally, by Antarctica). One component of the all-encompassing World Ocean, the Indian Ocean is delineated from the Atlantic Ocean by the 20° east meridian running south from Cape Agulhas, and from the Pacific by the 147° east meridian. The northernmost extent of the Indian Ocean is approximately 30° north in the Persian Gulf and, thus, has asymmetric ocean circulation. This ocean is nearly 10,000 kilometres (6,200 mi) wide at the southern tips of Africa and Australia; its area is 73,556,000 square kilometres (32.1 mi), including the Red Sea and the Persian Gulf. The ocean's volume is estimated to be 292,131,000 cubic kilometers (70,086,000 mi³). Small islands dot the continental rims. Island nations within the ocean are Madagascar (formerly Malagasy Republic), the world's fourth largest island; Comoros; Seychelles; Maldives; Mauritius; and Sri Lanka. Indonesia borders it on the east. The ocean's importance as a transit route between Asia and Africa has made it a scene of conflict. Because of its size, however, no nation had successfully dominated most of it until the early 1800s when the United Kingdom controlled much of the surrounding land. After the decline of the British Empire, the ocean has since been dominated by India and Australia.

Charts

British Admiralty
BA4070 – Indian Ocean southern part Scale 1: 10 000 000
BA4071 – Indian Ocean northern part Scale 1 : 10 000 000
BA4072 – Indian Ocean western part Scale 1 : 10 000 000
BA4073 – Indian Ocean eastern part Scale 1 : 10 000 000
BA4700 – Port Elizabeth to Mauritius Scale - 1 : 3 500 000
BA4701 – Maputo to Moqudisho - 1 : 3 500 000
BA4702 – Chagos to Madagascar - 1 : 3 500 000
BA4701 – Gulf of Aden to Seychelles and Maldives - 1 : 3 500 000
BA4706 – Bay of Bengal - 1 : 3 500 000
BA4707 – Maldives to Sumatra - 1 : 3 500 000
BA4708 – Australia west coast - 1 : 3 500 000
BA4709 – Australia south coast - 1 : 3 500 000
BA4710 – Cape Leeuwin to south east Indian ridge - 1 : 3 500 000
BA4711 – Ile Amsterdam to Ile Kerguelen - 1 : 3 500 000
BA4713 – Ile de Reunion to Ile St Paul - 1 : 3 500 000
BA4714 – Cocos Keeling to Ile St Paul - 1 : 3 500 000
BA648 – Maputo to Pont de Bartolomeu Diaz - 1 : 1 000 000
BA3300 – Mbashe Point to Maputo - 1 : 1 000 000
BA1810 – Mozambique Channel - 1 : 1 000 000
BA3877 – Mozambique Channel northern part - 1 : 1 076 000

Weather

Northern Indian Ocean

The Indian Ocean area is generally dominated by the NE and SW monsoons, which refers to the directions of the prevailing winds.

The NE monsoon is the cooler season and is mostly dry, whereas the SW monsoon is known as the rainy season, often with torrential rain and hot, humid conditions.

The SW Monsoon blows during the northern summer, from about May to September/October. The influence of this stretches across the northern Indian Ocean, from the Gulf of Aden to the Andaman Sea, often with force 7 - 8 winds, for days on end. This wind direction can be used to ones advantage, in a passage from the Maldives or Sri Lanka to Thailand or Malaysia.

The Northeast Monsoon blows during the northern winter from about November to March. The NE monsoon blows with less consistency than its opponent wind and covers the same area, and is generally of lighter force, 4 - 5 being the norm. Early in the year is the recommended time for making a westerly passage across the northern Indian Ocean. The ocean currents mostly follow the direction of the prevailing monsoons and are mostly in the ½ to 1 knot range. In the northern winter the equatorial current is almost non-existent.

Southern Indian Ocean

The southern Indian Ocean, from around 4ºS to 25ºS, is dominated all year round by the SE Trade Winds. In the Mozambique Channel the wind direction can change and is often higher than the average force 4 – 5 of the SE Trades. The recommended time to use these trades to your advantage is between mid April and mid November. South of the Equator there is a W to SW current, the South Equatorial Current, of around ½ to 1 knot.

Southern Ocean, to 40ºS, winds and current are discussed in Australia to South Africa.

Sources for weather information:

  • East Indian Ocean
    • The High Seas (METAREA) forecast for the Eastern Indian Ocean is published by the Australian Bureau of Meteorology. It is broadcast on HF/SSB frequencies by Australian Weather West (VMW) on a regular automated schedule. See their relevant website page for schedule and frequencies.
  • West Indian Ocean

Tropical Storms And Cyclones

Tropical Storms and Cyclones generally breed in the vicinity of 7º of their respective hemispheres and tend to track NW in the Northern Hemisphere and SW in the Southern Hemisphere. The most destructive areas tend to be between 10º and 15º, however this is not always the case.

A Cyclone normally “dies” out when it is over a major landmass, the exception seems to be Northern Madagascar, in the limits of these notes. Often a Cyclone will dissipate over Northern Madagascar, only to intensify over the Mozambique Channel.

The SW Indian Ocean has the most Tropical Storms or Cyclones in the Indian Ocean – the average from weather charts appears to be 8 Tropical Storms and 4 Cyclones per year.

The Cyclone season is from mid November to April, with December to March generally the worst months. However, Cyclones have been known outside the “season”.

Arabian Sea And Bay Of Bengal

The SW Monsoon period extends from May to September, and the Cyclone season is from May to December. Northern Australia’s Cyclone season is the same as the south Indian Ocean.

The Intertropical Convergance Zone, or ITZC or the Doldrums, is usually situated around the Equator or just south of it for most of the year. Often, in the “Belt”, one will sometimes experience days of tropical thunderstorms with dramatic lightning displays.
Excerpts from Indian Ocean Crossing Notes - by Tony Herrick

Currents & Tides

The Indian Ocean Currents

Passages

Also see the Mozambique Channel.

Communication

North Indian Ocean piracy incidences - 2010/11
Click on image for large, clear view
© Judy Rouse
South Indian Ocean piracy incidences - 2010/11
Click on image for large, clear view
© Judy Rouse

Also see World Cruiser's Nets

  • THE IO NET - Malaysia, Thailand, N.Indian Ocean to Red Sea 0030UTC on 8188USB - See Cruiser's Nets for details
  • South Africa Maritime Mobile Net - See Cruiser's Nets for details.
  • Radio Peri-Peri - See Cruiser's Nets for details (Now "Silent Key"). Now operated by "Roy".
  • Maritime Mobile Net South East Asia (MMNETSEA) - See Cruiser's Nets for details

Navigation

Any navigation notes here. If this section does not apply remove it.

Health & Security

Piracy is a major problem in the waters of Somalia and India.

Countries, Ports, Anchorages, and Islands

Counterclockwise from N to SW, SE, and NE.

TopWiki.png = Featured Cruising Guides, Poe.jpg = Port of Entry, Island icon.png = Island, Marina icon.png = Marina, Harbour icon.png = Harbor, Anchor Icon.png = Anchorage, Question icon.png = Needs data.

Countries Islands Countries
& Islands
Ports & Anchorages
India Question icon.png
Oman
Yemen
Somalia Question icon.png
Kenya
Tanzania
Mozambique
South Africa
Australia
Indonesia
Singapore
Malaysia
Thailand
Burma
Bangladesh Question icon.png
Sri Lanka
Maldives
Chagos Archipelago
British Indian Ocean Territory Question icon.png
Seychelles
Comoros
Mayotte Question icon.png
Madagascar
Mauritius
Rodrigues Question icon.png
Reunion
Kerguelen Islands
Cocos (Keeling) Islands Question icon.png
Christmas Island
Nicobar Islands Question icon.png
Andamans


Zanzibar

Friends

Contact details of "Cruiser's Friends" that can be contacted for local information or assistance.

Forums

List links to discussion threads on partnering forums. (see link for requirements).

Links


References and Publications

{{Reference|Rod Heikel|Greek Waters Pilot Imray||Laurie and Wilson, Cambridgeshire|9780852889718}}, expands to
Rod Heikell, Greek Waters Pilot Imray, Laurie and Wilson, Cambridgeshire, ISBN 9780852889718
  • Author, Title, Publisher, ISBN ISBN number
  • Author, Title, Publisher, ISBN ISBN number

You may want to remove the above entries and use instead a link to the Country or Region that lists the relevant references. If so enter, after removing {{MagentaText|xx}}, the following:

See [[Country or Region#References_&_Publications|Coutry or Region]].

If you do not use the above link, please remove it.

Also See

Comments

We welcome users' contributions to the Wiki. Please click on Comments to view other users' comments, add your own personal experiences or recommend any changes to this page following your visit.


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Names: Lighthouse, Zbyszek, TaoJones, Haiqu, Timovaan, Istioploos


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