Method of constructing a man-made sea defense system in the open ocean

A method of constructing a man-made sea defense system at a preselected ocean site in the open ocean, comprising the steps:

• providing a plurality of floatable sea-defense caissons, each caisson having a top, a bottom, a pair of opposed sloped sides sloping outwardly in a direction from the top to the bottom, and a pair of opposed ends, the caissons being connectable in end-to-end relation to form a sea defense system in the ocean;
• transporting the caissons by floating them in the ocean to a preselected ocean site in the open ocean;
• preparing the ocean floor at the preselected ocean site to receive the caissons including dredging a channel in the ocean floor for receiving the bottoms of the caissons;
• sinking the caissons onto the prepared ocean floor and connecting the sunken caissons in a line in end-to-end relation so that the bottoms of the caissons seat in the channel on the ocean floor and the tops of the caissons extend above the ocean surface;
• adding material onto and around the sloped sides of the caissons to effectively secure the caissons to the ocean floor;
• providing a pair of floatable anchor tower caissons, each anchor tower caisson having a top, a bottom, a sidewall and a height greater than that of the sea-defense caissons and being configured to connect to the ends of the sea-defense caissons;
• transporting the anchor tower caissons by floating them in the ocean to the preselected ocean site;
• sinking the anchor tower caissons onto the prepared ocean floor and connecting the sunken anchor tower caissons to the respective ends of the two opposite endmost sea-defense caissons in the line of sea-defense caissons so that the bottoms of the anchor tower caissons rest on the ocean floor and the tops of the anchor tower caissons extend above the ocean surface and above the tops of the sea-defense caissons;
• and
• adding material onto and around the sidewalls of the anchor tower caissons to effectively anchor all of the caissons to the ocean floor.