# An Evaluation of the Harbor of Yokosuka, Japan As a Typhoon Haven/Documentation Form

| REPORT DOCUMENTATION PAGE | REPORT DOCUMENTATION PAGE | READ INSTRUCTIONS BEFORE COMPLETING FORM |
| 1. REPORT NUMBER | 2. GOVT ACCESSION NO. | 3. RECIPIENT'S CATALOG NUMBER |
| 4. TITLE (and Subtitle) An Evaluation of the Harbor of Yokosuka, Japan as a Typhoon Heaven | 4. TITLE (and Subtitle) An Evaluation of the Harbor of Yokosuka, Japan as a Typhoon Heaven | 5. TYPE OF REPORT & PERIOD COVERED Master's Thesis March 1975 |
| 4. TITLE (and Subtitle) An Evaluation of the Harbor of Yokosuka, Japan as a Typhoon Heaven | 4. TITLE (and Subtitle) An Evaluation of the Harbor of Yokosuka, Japan as a Typhoon Heaven | 6. PERFORMING ORG. REPORT NUMBER |
| 7. AUTHOR(s) Russell John Graff | 7. AUTHOR(s) Russell John Graff | 8. CONTACT OR GRANT NUMBER(s) |
| 9. PERFORMING ORGANIZATION NAME AND ADDRESS Naval Postgraduate School Monterey, CA 93940 | 9. PERFORMING ORGANIZATION NAME AND ADDRESS Naval Postgraduate School Monterey, CA 93940 | 10. PROGRAM ELEMENT PROJECT, TASK AREA & WORK UNIT NUMBERS |
| 11. CONTROLLING OFFICE NAME AND ADDRESS Naval Postgraduate School Monterey, CA 93940 | 11. CONTROLLING OFFICE NAME AND ADDRESS Naval Postgraduate School Monterey, CA 93940 | 12. REPORT DATE March 1975 |
| 11. CONTROLLING OFFICE NAME AND ADDRESS Naval Postgraduate School Monterey, CA 93940 | 11. CONTROLLING OFFICE NAME AND ADDRESS Naval Postgraduate School Monterey, CA 93940 | 13. NUMBER OF PAGES 107 |
| 14. MONITORING AGENCY NAME & ADDRESS (If different from Controlling Office) Naval Postgraduate School Monterey, CA 93940 | 14. MONITORING AGENCY NAME & ADDRESS (If different from Controlling Office) Naval Postgraduate School Monterey, CA 93940 | 15. SECURITY CLASS (of this report) UNCLASSIFIED |
| 14. MONITORING AGENCY NAME & ADDRESS (If different from Controlling Office) Naval Postgraduate School Monterey, CA 93940 | 14. MONITORING AGENCY NAME & ADDRESS (If different from Controlling Office) Naval Postgraduate School Monterey, CA 93940 | 15a. DECLASSIFICATION/DOWNGRADING SCHEDULE |
| 16. DISTRIBUTION STATEMENT (of this Report) Approved for public release; distribution unlimited. |||
| 17. DISTRIBUTION STATEMENT (of the abstract entered in Block 20, if different from Report) |||
| 18. SUPPLEMENTARY NOTES |||
| 19. KEY WORDS (Continue on reverse side if necessary and identify by block number) Tropical cyclone Typhoon Typhoon havenTropical meteorology Yokosuka, Japan |||
| 20. ABSTRACT (Continue on reverse side if necessary and identify by block number) This study is an evaluation of the port of Yokosuka, Japan as a typhoon "haven." Characteristics of the port discussed include the topographical effects on winds during the passage of tropical cyclones, port facilities, wave action and storm surge. Problems to be considered when remaining in port and possible evasion procedures for ships sortieing are examined. ​Tropical cyclone tracks from 1947-1973 for the western North Pacific were analyzed to determine the probability of threat to the port. Observations by the author and conversations with harbor authorities are utilized in arriving at conclusions. In most instances the results show that the port of Yokosuka is a safe typhoon haven. To aid commanders in their decision making, an operationally oriented flow diagram is presented which summarizes the location of various sections of the text. |||