In the case of adopting the same double arrow blade structure as the conventional minesweeping boat, it was thought that the inner layer board thickness became 47 mm, but it is suppressed to 20 mm by this.
In the case of adopting a similar double arrow blade structure as the conventional minesweeping boat, it was believed that the inner layer board thickness would be 47 mm, but it is reduced to 20 mm by this.