Singabakhiqizi abakhulu baseShayina kanye nefekthri yemishini yokumaka yomugqa we-convex ozihambelayo.Ngokusho kwedatha yezibalo zamacala omhlaba, izingozi zomgwaqo zizoncishiswa ngamaphesenti angaphezu kuka-30 ngemva kokwamukelwa kwemigqa ye-convex mark, abalimala kanye nokulahlekelwa kwezomnotho kwehle kakhulu.Ngenxa yalokho ochwepheshe banxusa ukusetshenziswa kwalolu hlobo lomugqa womaka njengomugqa ojwayelekile wokuphepha kwethrafikhi.