I am not familiar with the Poseidon project, but I can say that on the operational level information is crucial. The more we have, the more we can make enlightened decisions and respond effectively.
Since I am not aware of this project in particular, I can only provide a general answer. Indeed, the more information we have on marine traffic or activities, the better the decisions we can make. They can be decisions that require action on our part, or decisions that will require that we ask other organizations to intervene or validate information.