Malsinsr Malist na tsaye ga "Matsakaicin tsananin girman tsarin haske tare da fitilun da ke nuna alamun hasken wuta". Wannan samfurin shine taimakon filin jirgin sama wanda aka yi amfani da shi don samar da jagora da nuni yayin saukar jirgin sama. Yawanci ya ƙunshi jerin hasken wuta a ɓangarorin biyu na titin da za su nuna hanyar kusantar da kuma nuna alamar jirgin sama a kwance. Par38 yana nufin girman da kuma siffar kwan fitila, wanda yawanci ɗaya daga cikin ƙayyadaddun bayanai don hasken wutar fitila na waje. Wadannan kwararan fitila suna amfani da graption ko tsinkaya don samar da takamaiman kusurwar katako da tasirin haske.