1. Cetaceans:
Radiated Noise
IMO Work

2. Radiated Noise Near field vs far field Noise sources: flow noise
IMO Correspondence Group
Near field vs far field
Noise sources:
flow noise
machinery
cavitation
biggest component ~ 100 Hz

3. Radiated Noise
Voluntary measures
ship operation
ship construction

4. Radiated Noise Propeller design & husbandry low cavitation designs
Efficiency measures
Propeller design & husbandry
low cavitation designs
alternative propulsion – twin screw, azipod
hull & propeller cleaning

5. Radiated Noise Future? Voluntary measures – mandatory elements
More efficient ships = quieter ships
More information on impact of background noise on cetacean behaviour
Assess different ship types for impact
Location of shipping routes

6. Thank you
Discussion?