5489. What type of knot in illustration D030DG below is indicated by the Letter «U»?

The knot indicated by «U» in illustration D030DG is a half hitch, characterized by a single turn of the working end around a standing part, secured by tucking the end under itself. This configuration aligns with the definition of a half hitch, distinguishing it from a plain whipping which secures a rope end, a becket bend which joins two rope ends, and a round knot which combines two overhand knots.