When assessing new obstacles during LZ operations, what factors should be considered?

• A. Color
• B. Distance
• C. Size, location, and impact on approach path.
• D. Temperature

Answer: (C)

When evaluating obstacles during LZ operations, focus on three factors: size, location, and how the obstacle affects the planned approach path.

Size tells you how much clearance you’ll need to safely pass by or over the obstacle. A larger obstacle demands more vertical and lateral room, which can shrink the usable approach corridor and raise the risk if margins are tight.

Location matters because an obstacle’s position relative to the landing zone and the intended approach or departure route determines whether it interferes with the flight path. An obstacle off to the side might be skip-able, but one that sits in the final approach or hover area can force you to alter the path, altitude, or sideslip.

Impact on the approach path is the key driver for deciding how to proceed. If the obstacle would force a deviation that exceeds safe margins, you must adjust the plan—change the approach path, increase altitude earlier, shift to a different LZ, or execute a go-around. This evaluation directly informs safety margins and decision-making during a critical phase of flight.

Color and temperature don’t provide actionable risk data for obstacle assessment in LZ operations, and distance alone doesn’t capture whether an obstacle intrudes into the approach corridor or affects rotor wash and clearance.