This article reports on the artefacts and environment of marine ballast and pottery sites identified through inter-tidal and underwater survey around Kilwa, Tanzania, one of the most important medieval sultanates along the east African coast. An inter-tidal site on the limestone fringing reef on the approaches to Kilwa Kisiwani Harbour and an underwater site within the harbour have been dated from associated pottery to c.8th–10th century and the 13th–16th century respectively. The presence of exotic basalt ballast is discussed as an indicator of wreck-sites.

中文翻译：

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来自坦桑尼亚基尔瓦的沉船证据

本文报道了通过在坦桑尼亚基尔瓦附近的潮间和水下调查确定的海洋压载物和陶器遗址的人工制品和环境，坦桑尼亚基尔瓦是东非海岸最重要的中世纪苏丹国之一。在通往基尔瓦·基西瓦尼港口的途中，石灰岩边缘礁石上的潮间带遗址和该港口内的水下遗址的年代分别可追溯至约8至10世纪和13至16世纪。讨论了奇异玄武岩镇流器的存在，以作为失事地点的指示器。