Slip Ring. An appropriate slip ring with sufficient passes to match the conductors required in the umbilical needs to be specified and to be installed in the winch drum.
'A' Frame or Crane. A mechanism is needed to lift and overboard the ROV. This can be a crane or 'A' frame suitably rated to accommodate the maximum weight to be deployed including the weight of umbilical in air or water, (whichever is greater), and the applied dynamic amplification factor specified which is usually 3G. For self contained packages, 'A' frame systems are generally preferred and in the standard Saab Seaeye range these include an elevated pivot point to allow clearance of the ROV and its TMS over the ship's side or guard rails. Due to their smaller footprint, Crane LARS can be used when deck space is at a premium.