ɡɹˈɪd ɹˈɛfɹənsᵻz aɪdˈɛntᵻfˌaɪ ðɪ ɐpɹˈɑːksɪmət sˈɛntɚɹ ʌvðə lˈeɪk ɔːɹ ðə dˈæm ɪnðə kˈeɪs ʌv ˌɑːɹɾɪfˈɪʃəl ɹˈɛzɚvwˌɑːɹz.
Grid references identify the approximate centre of the lake or the dam in the case of artificial reservoirs.