A normal belt capstan assembly for arrays towed by vessels includes a drive wheel mounted on the vessel and adapted to deploy and discharge an array. The drive wheel has a continuous groove throughout an outer edge thereof with opposed rims on either side of the groove. The assembly further includes a normal belt mounted on a plurality of rollers and disposed along a portion of the periphery of the drive wheel, the belt having a continuous central groove formed in a surface facing the drive wheel. The combined drive wheel groove and central groove are adapted to receive the array and termination module, and a retaining groove on either side of the central groove are adapted for receiving the drive wheel rims. The normal belt provides a normal force to the array and termination module.