DNV DNVGL-RU-SHIPS PART 6 CHAPTER 8 [ Revised ]

The additional class notation COMF includes requirements for noise levels, vibration levels and the performance of the on board HVAC system, for passenger ships, cargo ships, yachts and high-speed crafts. The areas included are cabins, public spaces, wheelhouse, radio rooms, offices, control rooms, hospital and recreation rooms.

Compliance with the rules shall be verified through measurements of defined environmental parameters. Possible influence of vibration on machinery, structure or other systems is considered in other relevant Society rules. The least strict noise level and sound insulation requirements (crn = 3) for cargo ships correspond to the requirements in IMO MSC 337(91) "Code on noise levels on board ships". In order to achieve the class notation , the vibration criteria's in this section shall also be satisfied.