Boats and ships based on blind area boosting sail

The utility model discloses a boats and ships based on blind area boosting sail is located the ship board both sides respectively and respectively arranges one or one be listed as the sail. Wherein, the sail opens the back, shelters from the sight that the driver's cabin lies in view point on the midship line, with the contained angle maximum rating of midship line under satisfy following condition: more than or equal to 5 degree, less than or equal to 15 degree. And, under the preferred mode, the sail can 360 degrees rotations. The utility model has the advantages of 1. Using the view point as the centre of a circle, arranging the sail apart from the blind area within range of ship midship line 5 degrees to 15 degrees, the complete rotary sails of bigger more and flexible operation are arranged to the present rule of utilization that can furthest, 2. Arrange the sail with freighter in the past and compare that this method does not need too much to adjust original the arranging of boats and ships, guaranteeing to be shipbuilding and operation reduce cost under the safe prerequisite.