NOISE ON BOARD Lanfranco Benedetti - CESA Tripartite – Tokyo 2010

Noise on Board Issue actually under discussion in IMO DE sub committee. Proposal from EC to make mandatory noise limits beyond the IMO Res. 468 (XII) during DE53. Concerns from several parts (see the relevant number of submissions made to DE54).

Noise on Board Main References: IMO Res. 468 (XII) EC Directive 2003/10/EC EC submission DE53/10 National regulations (Ch. A III (b1) DMA Tech. Regulation) All slightly different in terms of levels and rooms designation

The dB scale is a logarithmic and then: 5 dB for the engine room is a reduction of around µPa

Room designation acc. to the Annex to DE 53/10 (similar to DMA Ch. A III B(1)) acc. to IMO Res. A.468(XII) Max. noise limit [db(A)] acc. to DE 53/10 acc. to IMO Res. A.468(XII) Δ Work areas Work spaces 1. Machinery spaces, including steering engine Machinery spaces (continuously manned) Machinery spaces (not continuously manned) –5 2. In case of stopped machinery in machinery spaces85n.a. 3. Workshops Workshops –5 4. Separate separator room Non–specified work spaces –5 5. Machinery control rooms and manoeuvring rooms Machinery control rooms –5 6. Galley Non–specified work spaces – Navigation Spaces 7. Wheelhouse, including radio room Navigation bridge and chartrooms Radio rooms = –5 8. Listening posts Listening posts, incl. navigation bridge wings and windows 70 = 9. Offices in the accommodation and deck control rooms Offices 65 = 10. Shops and newsagents Non–specified work spaces – Other work areas Non–specified work spaces –5

Room designation acc. to the Annex to DE 53/10 (similar to DMA Ch. A III B(1)) acc. to IMO Res. A.468(XII) Max. noise limit [db(A)] acc. to DE 53/10 acc. to IMO Res. A.468(XII) Δ Recreation areas Accommodation spaces 12. Treatment rooms (infirmary) Cabins and hospital 60 = 13. Sleeping quarters Cabins and hospital –5 14. Recreational and exercise rooms Recreation rooms 65 = 15. Messrooms and other internal accommodation spaces Mess rooms –5 16. External recreation areas Open recreation areas –5

The dB scale is a logarithmic and then: 5 dB for the engine room is a reduction of around µPa (i.e. 50%)

CONCLUSIONS To carefully address the problem of technical feasibility in terms of noise level related to the specific room designation; To carefully consider the noise levels in eventually new defined rooms; To privilege reductions in rooms for which the reduction allows not use anymore personal protection means; To take into consideration a two tier approach by introducing mandatory and recommended levels.