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*'''Security Orbitals''' are used as orbital defense stations for Tau worlds and are heavily armed to deter attacking enemy fleets.{{Fn|1}}*'''Waystations''' are distributed throughout the Tau Empire. They mark out the main routes between Tau [[sept]]s and are used to speed communications between outposts.{{Fn|1}}*'''[[Nicassar]] Caravans''' are large networks of conjoined [[Dhow]]s which the aliens employ when traveling over long distances at their natural leisurely place. Occasionally Caravans will accompany Tau fleets to war, and if attacked a Dhow Caravan may detach to fight in the defense of their community. They are so slow that they are considered practically immobile in space combat.{{Fn|1}}*[[Air Caste]] [[Orbital City]]: Large orbiting cities where members of the Air Caste are born and mature.{{Fn|2}}

*{{Endn|1}}: [http[Battlefleet Gothic://wwwArmada (Book)]], pg.games-workshop.com/MEDIA_CustomProductCatalog/m1280012_BFG_Tau_Fleets.pdf To Unite the Stars]106*{{Endn|2}}: [http://web.archive.org/web/20130509084806/http://www.forgeworld.co.uk/WarhammerBattlefleet-40000Gothic/TAU-SECURITYAIR-CASTE-ORBITAL-CITY.html Tau Security Orbital]''(saved archive page, dated May 2013, last accessed 9 August 2015)''