Detailed are assistive mechanisms for vehicle operators designed to reduce risks associated with degraded landing and other situations. Cement, steel and iron slag crushed to 40 mm or less, decomposed hardwood chips on the order of 20 to 80 mm, and water are mixed, and the obtained mixture is cast into a formwork. Advantages of these novel compositions include use of them without need for pH adjustment andor the presence of electropositive metals, inorganic acid, or alkaline compounds. One of the identified landmarks located at one of the points of divergence is selected and incorporated into the navigation route at one of the points of divergence.