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Anchor text: Chennai Port Data for Containers and Navy</ref> INCORRECT URL--> The approach channel to the port has two sections—the entrance channel within the protection of outer arm and the outer channel beyond the protection of outer arm. The total length of the entrance channel is 7 km. The width of channel gradually increased from 244 m to 419 m at the bent portion, then maintains a constant width of 305 m. The depth of the inner and the outer channels are 18.6 m and 19.2 m, respectively, below chart datum, with a swell allowances of 3 m.<ref>{{cite web | title = India—Chennai Port | publisher = AsiaTradeHub.com | url = http://www.asiatradehub.com/india/portmadras.asp | access-date = 6 November 2011 | archive-url = https://web.archive.org/web/20111001005050/http://www.asiatradehub.com/india/portmadras.asp | archive-date = 1 October 2011 | url-status = dead }}</ref> The entrance is 350 m in Bharathi Dock and 125 m in Dr. Ambedkar Dock. The draught in the navigational channel is maintained by [[dredging

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