What system is used for basic stabilization of helicopters?

• A. GPS
• B. SAS
• C. SEMA
• D. Trim

Answer: (B)

Stabilization augmentation is the feature that automatically dampens disturbances and keeps a helicopter steady. It uses sensors—like gyros and accelerometers—to detect unwanted motion in roll, pitch, and yaw, then commands the flight controls to counteract it. This automatic support lowers pilot workload and helps maintain a steady attitude during hover and low-speed flight, which is exactly what “basic stabilization” means.

GPS provides position and navigation data, not automatic stabilization. Trim is a manual adjustment that relieves control forces to hold a chosen attitude, but it doesn’t continuously stabilize the aircraft on its own. The other option isn’t a standard stabilization feature either, so it doesn’t fit as the basic stabilization method.