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Navigation map of the waters and straits around some of the islands of the Riau Archipelago, between Sumatra and Batam. Bathymetry (sea depth), current and tide data, reefs, shoals and other obstructions (clay, mud, shells, stones, sand) are marked.

Map of Singapore Island, including the surrounding islands and straits, and southern Johor. Lighthouses are marked in red and yellow, including Horsburgh Lighthouse on Pedra Branca, Raffles Lighthouse and Fort Canning Lighthouse.