Harbour porpoise: assessing the effect from underwater noise on their behaviour

You will need to assess the effects of disturbance to harbour porpoise if your marine development activity generates underwater noise.

You can use the methods in assessing disturbance to harbour porpoise to estimate the effect of underwater noise.

As a developer or consultant it is important that you use these methods.  This will provide enough information to allow you to complete an environmental impact assessment (EIA) and the competent authority to undertake a habitats regulations assessment (HRA).