Linepack at sunrise

 Coastal Profiler Mooring (CPM) line packs are tested early in the morning on deployment days. CPM anchors are recovered by means of an acoustic release. The release frees a float which rises to the surface pulling the line pack – an aluminum frame wound with thin, strong synthetic line- which unspools as the float rises. The line is still connected to the anchor below. The float is hooked by the ship, allowing the line to be connected to a winch for hauling the anchor back. A properly functioning release is critical to the operation, so testing is part of the normal routine.