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Some sietches, such as Sietch Tabr, also housed a stunted sandworm for Water of Life rituals. When a Fremen died, his yali typically went to his son, unless he died in the Tahaddi Challenge, in which case the yali went to the victor. As such, a Fremen and his family would usually be assigned a small number of rooms within the sietch. However, some privacy was allowed, especially when it came to spending time with the family. Most Fremen living within a sietch would share much.
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It was governed by a Naib, and was constantly guarded, primarily from any hostile off-world humans.
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The physical infrastructure of a sietch consisted of living and ceremonial quarters. Stillsuit manufacturing, processing spice and converting it into fibrous form, small scale farming, food processing, as well as the tribe's water storage, water reclamation facilities and power supply, seem to be common to most if not all sietch communities. It had to be capable of not only housing the hundreds or even thousands Fremen families, but also large enough to house all the internal economies and industries, basically a small city and all the civic necessities that would be needed even for a minimalist society like the Fremen community. The actual size of the mountains and rock outcrops had to be quite large as was the network of tunnels and caves. It was located within either a man-made or a naturally carved cave system, or occasionally a combination of both. A sietch was typically located within the mountains or rock outcrops that were scattered throughout the deserts of Arrakis, hidden from the harsh sun Canopus.