For reducing the number of anchors required for mooring a plurality of WECs in a body of water, the WECs are arrayed in two patterns enabling the sharing of anchors among the WECs. A terminal column 26a comprises a plurality of terminals 18 aligned in a direction away from the liquid crystal L. The programmable layer comprises a trapping dielectric layer inserted between two insulator layers, and the trapping dielectric preferably comprises a nitride or an oxide having buried polysilicon islands.