The team used a satellite photo of a suspected submerged city to find the site then surveyed it with a combination of deep-ground radar, digital mapping, and underwater technology.
Under unique viewing conditions, oil slicks can become visible in photo-like images, but usually, radar imagery is needed to clearly see a spill from space.
只有在独特的观看条件下，浮油才能在天然色图像上看见。通常需要从太空的雷达成像才能看清楚。
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A 3-d radar image, using false colour, of the undersea river channel where it enters the Black sea from the Bosphorus Strait. Photo: University of Leeds.