The invention relates to a pipeline 1 moving effluents at seabed level and comprising an inner shell 3 and at least one outer shell 2 which is separated from the inner shell by an annular space 7 receiving an insulating layer 4. The apparatus includes an optical element, and at least two clamping assemblies for clamping the optical element. In response to receiving the packed command, a storage map table in the storage device can be updated.