Linga Sound is the strait between the islands of Whalsay and West Linga in the Shetland islands of Scotland.
The sound has a depth of . The narrowest width is between the contours. The sound is the channel most often used by large vessels. The tidal stream running south through the sound starts about four and a half hours before high water at Lerwick, and the stream starts running north about two hours after high water at Lerwick. The maximum rate is 6 knots. The sound has several islets. The most notable is the Skate of Marrister. A lighthouse on Suther Ness below Brough stands at the northern entrance into Linga Sound.
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