Abstract: A cargo stabilizing system for preventing shifting of cargo during transport in a carrier vehicle, the system including a channeled cargo-supporting floor, and a snubbing device releasably engaging the floor channels and projecting upwardly to block movement of the cargo. The snubbing device includes a snubbing block and a manually actuatable latching subassembly by which the snubbing block is selectively locked to, or released from, the floor channels. In a preferred form, the snubbing device includes cooperating wedge elements, a handle and an actuator bolt connected between one wedge element and the handle to move the wedge elements relative to each other in a channel locking and releasing movement.