Angular adjustment device between a mast of a boat and a furling boom

An angular adjustment device for a boat, the boat comprising a vertical mast, a furling boom articulated on the mast, a sail connected to the mast by means of a first luff segment of the sail furling on the boom and at least one member for manoeuvring the sail configured to pivot the boom vertically with respect to the mast so as to vary a vertical angle formed, on the side of the sail, between the boom and the mast, the angular adjustment device being configured to adjust the vertical angle and comprising:

• at least one detection member configured to detect a second luff segment of the sail which may move horizontally on the boom;
• a control module connected to the manoeuvring members and to the detection member, said control module being configured to control the manoeuvring member to pivot the boom vertically so as to reduce the vertical angle in the event that the detection member detects the displacement of the second luff segment at the level of a first limit position on the boom and configured to control the manoeuvring member to pivot the boom vertically so as to increase the vertical angle in the event that the detection member detects the displacement of the second luff segment at the level of a second limit position on the boom, the first limit position being coincident with the second limit position or closer to the mast than the second limit position.