Ko te ESFR he pupuhi ka timata aunoa i roto i te awhe pāmahana kua whakaritea i raro i te mahi o te wera ki te tohatoha wai i roto i tetahi ahua me te kiato ki runga i te waahi whakamarumaru kua hoahoatia, kia tutuki ai te paanga aukati moata.