The scale was introduced by sir francis beaufort of the british navy in the early 19th century . it employs the speed of a fully rigged sailing vessel to describe the wind speed 在十九世纪初，英国海军大将蒲福提出以帆船在海上航行的速度来区别风力的大小。
2.
The scale was introduced by sir francis beaufort of the british navy in the early 19th century . it employs the speed of a fully rigged sailing vessel to describe the wind speed 在十九世纪初，英国海军大将蒲福提出以帆船在海上航行的速度来区别风力的大小。
