However, the exploitation of Scotland's wave and tidal energy resource from the most energetic sites is hindered by insuf!cient electrical grid infrastructure. The majority of promising wave po- wer sites are situated around remote island locations, with the greatest tidal energy resource found in channels between islands, or between Scottish islands and the mainland. A strong grid infrastructure between these remote sparsely populated develop- ment sites and the main population centres further south is therefore imperative for the further development of projects and marine energy technology in the region.<br>This article, which reviews the marine energy resource of Scotland, is organised into three main sections - commercial progress (Section 2), tidal resource (Section 3), and wave resource (Section 4). Within each of the resource sections, sites that are currently leased for either tidal or wave energy development are brie"y described, followed by a detailed regional assessment of the resource (i.e. encompassing locations that have not necessarily been leased), based on existing studies and new interpretations of numerical models combined with observations. Finally, the article concludes with a discussion of issues affecting future development of marine energy in Scotland, such as exploiting less energetic sites, and grid connectivity (Section 5).
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