The helicopter carrying the SEALs proceeded to the landing zone alone, without external lighting. During the Ranger insertion earlier that night, the CH-47D had approached from the south; this time, it approached from the northwest. The helicopter made its last radio transmission stating it was one minute away from the landing zone, then descended to an altitude of 100–150 ft (30–46 m) and slowed to a speed of 50 kn (58 mph; 93 km/h) as it approached the landing zone.[1][2]