 And so, the Friction Hitches are contained in this chapter on the errant pull angle stated as "LENGTHWISE PULL".Book shows a 'linear' Half Hitch to precede a Timber Hitch (that shows should pull at right angle to spar) so can pull LENGTHWISE in ABoK#"1733.The TIMBER HITCH AND HALF HITCH" Killick hitch perhaps best demonstrates the directional force effect as he shows it as the very first knot in the chapter right after the previous discussion as context .