Abstract: A tie-down system is disclosed for securing a payload carried by a transportation device such as a vehicle, aircraft, watercraft, or to a stationary structure. A half-round rod track having a longitudinal channel and slot is attached to the transportation device, and a carriage is slidably movable withing the channel and slot. The carriage is secured to the track at various positions by a S-shaped hook disposed through a hole in the carriage aligned with one of a plurality of notches in the track.