The well intervention system of the invention is a novel subsea deployed wire line, stiff wire, coil tubing, or reeled pipe unit landed on the existing subsea wellhead assembly or tree, wherein the unit includes as an additional novel component a carousel tool caddy. The system includes pillar armor attachable after an original equipment manufacture door and hinge are removed. The second winding axis intersects the first winding axis at an intersection point that is within the substrate. The coil units may further include elongated, low-thermal conductance supports disposed within the support extensions. In addition to the secure database, the server system includes one or more cryptographic modules for authenticating, processing value for the VBI, and generating indicia data for the plurality of users.