11. Unfortunately, the navigational charts and sailing directions do not completely agree with each other as to the boundary. 12. There are also products known as Sailing Directions , which are books written by various Hydrographic Offices throughout the world. 13. These data are obtained from several sources, including pilots and " Sailing Directions " from other countries. 14. Between editions, Sailing Directions are corrected via a binary patch process referred to as Publication Data Update ( PDU ). 15. It was such winds, so frequently mentioned in the Sailing Directions , which the steam engine was supposed to overcome. 16. Two stranded wrecks lie about 90 m off the south shore along the reef line . ( Sailing Directions Pub-153) 17. Commodore Goldsborough and officers under his command made surveys of most of these new harbors, and prepared sailing directions for their entrance. 18. Shergin was also into archaeography : he collected antique books, poetry albums, songbooks, old sailing directions , and skippers notebooks. 19. She read Matthew Fontaine Maury's detailed guide " Sailing Directions ", prior to the voyage in May 1851. 20. John and Samuel Thornton, Hydrographers to the East India Company compiled the first chart and Sailing Directions for the Indian Ocean in 1703.
