A damping unit for an actuated motion platform, the damping unit including: a plate having a top surface, a bottom surface and opposed lateral plate surfaces, the bottom surface being adapted to be rigidly connected to a vibration source, the opposed lateral plate surfaces being disposed between the top surface and the bottom surface, the lateral plate surfaces including lateral projections, the lateral projections each having a top surface, a bottom surface, and at least three lateral surfaces; lateral mounting supports each receiving at least one of said lateral projections and being adapted for rigid fastening to the motion platform; a first resilient member overlying at least a portion of said top surface of said plate and being retained between the top surface and the motion platform by said lateral mounting supports, said first resilient member providing vibration absorption such as to limit vibrations transmitted from said plate to said motion platform in at least a direction substantially perpendicular to said top surface; two second resilient members, each of the two second resilient members being disposed between the at least three lateral surfaces of a corresponding one of the lateral projections and a corresponding one of the lateral mounting supports, such that the lateral mounting supports constrain the second resilient members in at least a first direction substantially parallel to the top surface and a second direction substantially parallel to the top surface, the second direction being substantially perpendicular to the first direction, said second resilient members providing vibration absorption such as to limit vibrations transmitted from said plate to said motion platform in at least a direction substantially parallel to said top surface; and wherein thicknesses and material characteristics of the first resilient member and of the two second resilient members provide for dampening at least a selected frequency range of vibrations generated by the vibration source thereby limiting unwanted vibrations which are transmitted to the motion platform. a plate having a top surface, a bottom surface and opposed lateral plate surfaces, the bottom surface being adapted to be rigidly connected to a vibration source, the opposed lateral plate surfaces being disposed between the top surface and the bottom surface, the lateral plate surfaces including lateral projections, the lateral projections each having a top surface, a bottom surface, and at least three lateral surfaces; lateral mounting supports each receiving at least one of said lateral projections and being adapted for rigid fastening to the motion platform; a first resilient member overlying at least a portion of said top surface of said plate and being retained between the top surface and the motion platform by said lateral mounting supports, said first resilient member providing vibration absorption such as to limit vibrations transmitted from said plate to said motion platform in at least a direction substantially perpendicular to said top surface; two second resilient members, each of the two second resilient members being disposed between the at least three lateral surfaces of a corresponding one of the lateral projections and a corresponding one of the lateral mounting supports, such that the lateral mounting supports constrain the second resilient members in at least a first direction substantially parallel to the top surface and a second direction substantially parallel to the top surface, the second direction being substantially perpendicular to the first direction, said second resilient members providing vibration absorption such as to limit vibrations transmitted from said plate to said motion platform in at least a direction substantially parallel to said top surface; and wherein thicknesses and material characteristics of the first resilient member and of the two second resilient members provide for dampening at least a selected frequency range of vibrations generated by the vibration source thereby limiting unwanted vibrations which are transmitted to the motion platform.