A Mutual Recognition Type Approval Certificate has been issued for this, which is recognized by many classification societies (such as DNV, BV and ABS). Ideal for hazardous areas. Due to their low pressure drop, these silencers are suitable for high gas volumes and continuous operation. They are often used as a single silencer on engines with four or more cylinders and, in combination with an L45 reflection silencer, provide very high overall attenuation. Commonly used in propulsion, bow thruster installations and generators on tankers or offshore ship installations.