▁easy ▁to ▁tie ▁and ▁un t ie . ▁It ▁is ▁a ▁device ▁rig ging ▁rather ▁than ▁a ▁true ▁kn ot . ▁In ▁can y one ering , ▁it ▁is ▁used ▁to ▁isol ate ▁ro pe ▁str ands ▁to ▁allow ▁one ▁person ▁to ▁rapp el ▁while ▁another ▁is ▁getting ▁on ▁the ▁rapp el , ▁or ▁allow ▁rapp ellers ▁the ▁option ▁of ▁using ▁a ▁single ▁or ▁a ▁double ▁ro pe . ▁It ▁is ▁also ▁used ▁in ▁basket making . ▁ ▁Symbol ic ▁use ▁ ▁In ▁her ald ry , ▁this ▁kn ot ▁is ▁known ▁as ▁Sav oy ▁kn ot . ▁ ▁In ▁the ▁United ▁States ▁Navy , ▁a ▁figure - of - e ight ▁bad ge ▁was ▁formerly ▁worn ▁by ▁en list ed ▁men ▁who ▁had ▁successfully ▁completed ▁the ▁app rent ice ▁rating . ▁▁ ▁In ▁The ▁Sc out ▁Association ▁in ▁the ▁United ▁Kingdom , ▁awards ▁for ▁gall antry ▁and ▁long ▁service ▁are ▁represented ▁by ▁a ▁cloth ▁figure - of - e ight ▁kn ot ▁em blem ▁in ▁various ▁colours . ▁ ▁See ▁also ▁ ▁Figure - e ight ▁kn ot ▁( math emat ics ) ▁ ▁List ▁of ▁kn ots ▁ ▁References ▁ ▁Further ▁reading ▁ ▁Category : C lim bing ▁kn ots <0x0A> </s> ▁Ma ▁Zh ong ▁( d ied ▁ 2 4 9 ), ▁cour tes y ▁name ▁D ex in , ▁originally ▁named ▁Hu ▁Du , ▁was ▁a ▁military ▁general ▁of ▁the ▁state ▁of ▁Sh u ▁Han ▁during ▁the ▁Three ▁Kingdom s ▁period ▁of ▁China . ▁Li u ▁Bei ▁was ▁quite