Once they had arrived fairly close to a destination island, they would have been able to pinpoint its location by sightings of land-based birds, certain cloud formations, as well as the reflections shallow water made on the undersides of clouds.
Begitu mereka tiba cukup dekat dengan pulau tujuan, mereka akan mampu menentukan lokasinya dengan melihat burung-burung yang mendekati daratan, formasi awan tertentu, serta refleksi air dangkal yang dibuat di bagian bawah awan.