Obstacle An existing object, object of natural growth, or terrain at a fixed geographical location or which may be expected at a fixed location within a prescribed area with reference to which vertical clearance is or must be provided during flight operation.

Aero Linx: The Stearman Restorers Association The Stearman Restorers Association is an independent “Not for Profit” 501C-3 Corporation dedicated to the preservation, restoration, flying and safety of Stearman Aircraft through the education of both members and the public. The Stearman was a primary trainer for both Army and Navy cadets in WWII. The SRA was originally founded in 1966 and for the year 2012 1150 members in 25 countries...

"I am excited to get these trainers in the hands of the U.S. Air Force Rescue Warriors. The combat rescue mission is uniquely challenging in that it requires much of the mission planning to occur while in flight rather than prior to flight. This is due to the time-critical nature of the mission and the reality that the threat, location and condition of isolated personnel to be rescued are not fully known prior to takeoff. This requires that the aircrew become highly skilled at using the enormous networking and information capabilities that reside within the HH-60W, and that takes training and practice. These Weapons Systems and Operational Flight trainers will allow that training at the highest fidelity and realism ever seen."    Source:<