Abstract: There is provided high power laser systems, high power laser tools, and methods of using these tools and systems for performing laser operations. In embodiments the laser systems and methods utilize high velocity laser fluid jets, including fluid jets formed from conanda laser jet nozzles and flow through window laser jet nozzles. There is provide a system having a revolving beam dump. Thus, there is also provided high power laser systems, high power laser tools, and methods of using these systems and tools for removing structures, objects, and materials located offshore, under bodies of water and under the seafloor.