Specifications include, but are not limited to: Electronic Helicopter Dolly Landing System; i) Examples: Heliwagon, Best Tugs Papa, or TPWD approved equivalent; ii) Quantity: One (1); iii) Size: Minimum 16’ x 16’, maximum 17’ 3” x 17’ 3”; iv) Power Source: 100% Electric; v) Operation: Wireless Remote Control for Movement and Locking function; vi) Operational Run Time: Minimum of four (4) hours of continuous operation on a single charge. vii) Drive System: Electronically controlled drive motors providing forward and reverse movement. viii) Forward Speed: Minimum 200 feet per minute. (Approximately 3.33 feet per second or 1.83 miles per hour). ix) Steering: Electronic steering controlled via the wireless remote. x) Backup Tow Bar: Included with a standard 2-inch receiver hitch for manual towing in case of power failure or maintenance needs. xi) Wheel and Locking System: Electronic wheel locking system activated and deactivated via the wireless remote, eliminating the need for manual wheel chocks. The system must provide secure immobilization of the dolly.