According to the invention, fitted into the slot between the suction face side of a wing and said ventral fairing is a seal, the internal face of the free end of the lip of which comprises at least one boss able to keep said lip locally away from said suction face side to form a controlled leakage of air passing through said slot. The memory medium is configured to store a plurality of instructions configured to program the processor to receive a digital bit stream, transform the digital bit stream to an encoded digital bit stream. The image configuration comprises a base and a patterned portion.