A drogue parachute slowed the aircraft upon landing. The spacecraft continued to descend on the drogue chute. The frustum and drogue parachute continue on a separate trajectory to splashdown. The frustum is then pulled away from the SRB by the drogue chute. The drogue parachute's simpler design allows for easier deployment. Failure of the drogue parachute contributed to the accident. They were looking for materials suitable for drogue parachutes which could tolerate short-time mechanical stress. When not in use, the hose/drogue is reeled completely into the HDU. The cosmonauts commented on the burnt-metal odor of the drogue docking unit. While similar in design, the sea anchor is quite different in application from a drogue. SSVP consists of two components; an active probe, and a passive drogue. They called the movie "Le Port de la Drogue" ("Drug's harbour"). Third, the launch vehicle separated from the drogue. The optimal approach is from behind and below (not level with) the drogue. KC-135s may be equipped with a drogue depending on the mission profile.