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In this paper, we propose the Directional Antenna based RouTing (DART) protocol that utilizes direction information to route packets. The direction information is more robust to mobility than precise hop-by-hop path information, which makes DART suitable to highly dynamic scenarios. In N-node networks, the control packet overhead and routing mapping storage overhead scale as θ(N) and θ(N^(3/2))$. These overheads do not vary with mobility and network loads, which makes DART scales well with increasing mobility and network size. The simulations show that DART can offer a high packet delivery ratio.