What are the four steps included in the 4Rs for dealing with an obstacle?

• A. Remove; Reduce; Red (mark in red); Radio (radio to the pilot of such)
• B. Remove; Reduce; Re-evaluate; Radio
• C. Remove; Reduce; Red; Report to pilot
• D. Remove; Refuse; Red (mark); Radio

Answer: (A)

The four Rs describe a stepwise way to handle obstacles in an LZ/PZ so safety is maintained from the moment a hazard is found. Start with Remove—if you can physically clear the obstacle, do it. If removal isn’t possible, move to Reduce—lower the hazard’s impact or obstacles’ footprint by shifting or altering things so the aircraft has a safer path. If the obstacle can’t be removed or sufficiently reduced, move to Red—mark the obstacle in clear, visible terms so everyone knows where it is, commonly using red markers or conspicuous labeling on maps and the landing area. Finally, Radio—the pilot or flight crew must be informed via radio about the obstacle’s location and status, so they can adjust approach, timing, or route accordingly. This order prioritizes eliminating risk first, then minimizing it, then ensuring all teams are aware and can act, with clear communication to the aircraft. Other options change or omit steps like marking or the specific communication method, which is why they aren’t the correct sequence.