ˈɛf ɪz ɐ kˈɑːnstənt, ænd dˈiː ɪz ɐ pɚɹˈæmɪɾɚ ðæt ɹˈɪtʃɚdsən fˈaʊnd dᵻpˈɛndᵻd ɔnðə kˈoʊstlaɪn ɐpɹˈɑːksɪmˌeɪɾᵻd baɪ ˈɛl.
F is a constant, and D is a parameter that Richardson found depended on the coastline approximated by L.