# The Dockyard Port of Plymouth Order 1999, Paragraph 14: Vessels turning round


Within the limits of the Dockyard Port, a power-driven vessel underway which is about to turn round shall sound five short blasts on the whistle in rapid succession, followed after a short interval by—
(a) one short blast if turning with her head to starboard;
(b) two short blasts if with her head to port.

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Source: https://www.legislation.gov.uk/uksi/1999/2029/schedule/2/paragraph/14 (the official version)
Page: https://openlegislation.uk/dockyard-port-of-plymouth-order-1999/schedule-2/paragraph-14
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.