# The Territorial Sea (Baselines) Order 2014, Paragraph 2


For the purposes of this Convention, a bay is a well-marked indentation whose penetration is in such proportion to the width of its mouth as to contain land-locked waters and constitute more than a mere curvature of the coast. An indentation shall not, however, be regarded as a bay unless its area is as large as, or larger than, that of the semi-circle whose diameter is a line drawn across the mouth of that indentation.

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Source: https://www.legislation.gov.uk/uksi/2014/1353/schedule/1/crossheading/article-10/crossheading/article/10/bays_paragraph/2 (the official version)
Page: https://openlegislation.uk/territorial-sea-baselines-order-2014/schedule-1/crossheading-article-10/crossheading/article-10/bays_paragraph/2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.