| A Study on Yaw-checking and Course-keeping Ability of Directionally Unstable Ships |
|
Kyoung-Ho Sohn, Seung-Yeul Yang, Dong-Sub Lee, Jun-Young Bae |
|
|
| Abstract |
|
Yaw-checking and course-keeping ability in IMO’s ship manoeuvrability standards are reviewed from the viewpoint of safe navigation. Three kinds of virtual series-ships, which have different course instability, are taken as test models. The numerical simulation on Z-test is carried out in order to examine the correlation between known manoeuvrability in spiral characteristics and various kinds of overshoot angle. Then simulator experiments are executed with series-ships in a curved, narrow waterway by six operators(five active pilots and one ex-captain) in order to examine the correlation between known manoeuvrability and degree of manoeuvring difficulty. IMC criteria for yaw-checking and course-keeping ability are discussed and revised criteria are proposed. |
| Key Words:
IMO’s ship manoeuvrability standards;Yaw-checking;Course-keeping;Simulator experiment;Manoeuvring difficulty |
|
PDF Links
Download Citation
