A slipped half hitch[1][2] is a
knot in which the weight of the load the rope carries depresses the loop sufficiently to keep it in place until the load item is placed in its location. When no longer required the free end may be pulled and draw the loop through and so release the load.
^Day, Cyrus (1986). The Art of Knotting and Splicing, 4th Edition. Annapolis, Maryland: Naval Institute Press. pp. 36 (Knot #15).
ISBN0-87021-062-9. [first edition 1947]
^Ashley, Clifford W.. The Ashley Book of Knots. Published by Faber and Faber, 1993 — #52 — p14 —
ISBN9780571096596
^Day. The Art of Knotting and Splicing, 4th Edition. pp. 84 (Knot #88).