Abstract: A device for protecting a subsea structure from damage due to impact from falling objects. The device includes a lower shell that can be positioned over the subsea structure on the sea bed. The lower shell has a non-articulating cross sectional shape that provides a conduit between the lower shell and the sea bed. An upper shell is fixed to an outer surface of the lower shell and has a cross sectional shape that provides a conduit between the outer surface of the lower shell and the upper shell. The upper shell is sized and configured to be disposed on the lower shell. The lower shell can include footings to providing bearing support on the sea bed or may be positioned on separate footings or foundation on the sea bed. Methods of making the device and using the device to protect subsea structures are also disclosed.