OERK 2500N/04700E 2500N/04700E 2500N/04700E 2600N/04400E 2700N/04200E 2800N/04000E 2900N/03700E 2900N/03500E 3000N/03200E 3000N/03200E 3000N/03200E 3000N/03100E HECA