Manta Rays are driven into the ground, not augured or torqued, nor is a hole dug or drilled. There is "no disturbance" or "displacement" of soil. Unlike other anchoring systems, Manta Ray actually compacts the soil around itself - a clean, safe and simple operation.
The anchors are driven with conventional hydraulic/pneumatic equipment that is readily available worldwide. Once driven to the proper depth, the rod/tendon attached to the anchor is pulled to rotate the anchor into undisturbed soil-like a toggle bolt. This is called "ANCHOR LOCKING" the anchor (using the Manta Ray Anchor Locker). The anchor is pulled upon to reach the holding capacity required which is measured by a gauge on the "ANCHOR LOCKER." Each anchor is immediately proof loaded to the exact capacity required.
Manta Ray anchors have ultimate capacities up to 20 tons, and Stingray anchors have ultimate capacities up to 50 tons. After driving the anchor to the required depth, the driving tool (called drive steel) is removed. The anchor is then tipped and proof tested with Foresight’s Anchor Locking Kit from its edgewise driving position to present its bearing area to the soil. This is called “load locking”, and provides an immediate proof test of each anchor.