The Kockum Sonics Supertyfon MKT 150/90 is an air-driven Loudspeaker for use in the maritime market. The Supertyfon MKT 150/90 is used to send out sound signals for attention and information in the most efficient way. The Kockum Sonics Supertyfon MKT 150/90 High-Power whistle is suited for vessels of 200m or more in length.