Charts. Ponape Island. North coast of Ponape Island, Senyavin Islands, Caroline Islands, north Pacific Ocean, Ponape Harbor to Tauak Passage, from German surveys to 1912; with inset, Ronkiti Harbor, Ponape Island, from Japanese survey in 1918: chart 2930. Scale naut. m.=2.9 in., natural scale 1:25,000.