A fall pipe vessel installs rock on pipelines and other subsea structures. By using a remotely operated underwater vehicle (ROV) at the end of the fall pipe, we can install rocks in sea depths up to 2,000 m with precision. Thanks to the inclined fall pipe, this ship can also install rocks under permanent structures.
A side stone installation vessel builds rock berms and installs a rock protection layer on top of subsea installations such as pipelines in shallows waters. The rocks are pushed over its side but with modification can also install rocks under structures.