what did the british trade for in indian ocean
Routes. The Indian Ocean slave trade consisted of two primary routes. There was a northern route, part of the Arab slave trade, and a southern route dominated by the Portuguese in Mozambique. We of course know most about the 19th century when the British began their effort to end he slave trade.ot a lot is known about Zanzibar and the slave trade until the 19th century. By the time the Royal Navy moved against the Arab Indian Ocean slave trade, it was largely in the hands of the Sultanate of Zanzibar.