The invention relates to a communication buoy (10) suitable for immersing in a fluid, comprising an antenna (30), at least one arm (25), and a plurality of wings (15, 20) comprising at least a first wing (15) and a second wing (20), each wing (15, 20) being connected to at least one other wing (15, 20) by an arm (25) and being capable of generating a lift force when the buoy (10) is moving in the fluid. At least one of the arms (25) delimits an output opening (145) of the antenna (30), and one of the wings (15, 20) comprises a storage member (52) for storing the antenna (30), the buoy (10) further comprising a deployment member (140) configured for deploying the antenna (30), through the opening (145), outside the buoy (10).
