Admiralty Paper Chart Maintenance Record / United Kingdom Hydrographic Office - 5th ed. - Taunton : United Kingdom Hydrographic Office , 2017 - various pagination ; 30 cm. - NP ; 133A . ISBN: 9780707741840 £ 31.60 Subjects--Topical Terms: Navigation Dewey Class. No.: 623.8922 / Un314/P