# The Portland Harbour Revision Order 1997, Paragraph 6


(1) Subject to sub-paragraph (2) below, the master of a power-driven vessel other than a power boat shall not, except and in accordance with the prior permission in writing of the harbour master, cause or permit the vessel to proceed at a speed greater than 12 knots through the water when navigating—
(a) within the inner harbour; and
(b) in the approaches thereto north of a line drawn 048° (true) from “D” Head.
(2) The master of a power-driven vessel shall not, except and in accordance with the prior permission in writing of the harbour master, cause or permit the vessel to proceed at a speed greater than 6 knots through the water in the following areas—
(a) in Newton’s Cove, west of a line drawn 026° (true) from Torpedo Pier Light to the northern limit of the harbour;
(b) within 150 metres of the breakwaters, except as required to pass through the main fairways;
(c) in the inner harbour—
(i) west of a line drawn 026° (true) from the light structure (New Channel Beacon) situated at Latitude 50° 34.87' N, Longitude 002° 27.61' W to Torpedo Pier Light;
(ii) south of a line drawn 119° (true) from New Channel Beacon to the light on the northern corner of Queen’s Pier; and
(iii) south of a line drawn 251° (true) from Beacon E on the Outer Breakwater.
(3) For the purposes of sub-paragraph (1) above “power boat” means a power-driven vessel of less than 10 metres in length.
(4) This paragraph is without prejudice to paragraph 5 above and the Collision Regulations.

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Source: https://www.legislation.gov.uk/uksi/1997/2949/schedule/1/paragraph/6 (the official version)
Page: https://openlegislation.uk/portland-harbour-revision-order-1997/schedule-1/paragraph-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.