Host: The Kansai Society of Naval Architects, Japan
1.When chair seats are arranged front facing, anti rolling efficiency of seats is good but view ability of seats is bad. Then, actual circumstances of the view ability is easily recognized by drawing plans and sections of view estimating line.
2.We coexistence the anti rolling efficiency of seats and the view ability of seats by adopting rotating type gathering seats for 2 persons.
That is, when sea condition is hard, we get good anti rolling efficiency by arranging front facing seats and when sea condition is soft, we get good view ability by arraging sides facing seats.