iz ▁Bu in , ▁between ▁the ▁Val ▁Lav inu oz ▁and ▁the ▁Val ▁Tu oi . ▁ ▁References ▁ ▁External ▁links ▁ ▁P iz ▁Ch apis un ▁on ▁H ik r ▁ ▁Category : Mount ains ▁of ▁the ▁Al ps ▁Category : Mount ains ▁of ▁Gra ub ünd en ▁Category : Mount ains ▁of ▁Switzerland ▁Category : Two - th ous and ers ▁of ▁Switzerland <0x0A> </s> ▁The ▁Stra its ▁of ▁Tir an ▁( ▁) ▁are ▁the ▁narrow ▁sea ▁pass ages ▁between ▁the ▁S ina i ▁and ▁Arab ian ▁pen ins ulas ▁which ▁separate ▁the ▁G ulf ▁of ▁A q aba ▁from ▁the ▁Red ▁Sea ▁proper . ▁The ▁distance ▁between ▁the ▁two ▁pen ins ulas ▁is ▁about ▁. ▁The ▁body ▁is ▁named ▁after ▁Tir an ▁Island ▁located ▁at ▁its ▁entrance ▁ ▁from ▁the ▁S ina i , ▁on ▁which ▁the ▁Mult in ational ▁Force ▁and ▁Ob ser vers ▁has ▁an ▁observation ▁post ▁to ▁monitor ▁the ▁comp liance ▁of ▁Egypt ▁in ▁maintain ing ▁freedom ▁of ▁navigation ▁of ▁the ▁stra its ▁as ▁provided ▁under ▁the ▁Egypt – Is rael ▁Peace ▁Tre aty . ▁ ▁S ana fir ▁Island ▁lies ▁to ▁the ▁east ▁of ▁Tir an , ▁sout heast ▁of ▁the ▁shall ow ▁stra it ▁between ▁Tir an ▁and ▁Sa udi ▁Arab ia . ▁ ▁Background ▁ ▁International ▁documents ▁incons ist ently ▁refer ▁to ▁both ▁the ▁" St ra its ▁of ▁Tir an " ▁and ▁the ▁" St rait ▁of ▁Tir an ". ▁There ▁are ▁several ▁pass ages ▁formed ▁by ▁the ▁islands ▁between ▁Egypt ▁and ▁Sa