1. Tyrrhenian Sea, Italy--approaches to Gaeta and Formia Yale Public content 1990. 2011-12-06T18:59:02Z. 2015-10-21T15:07:18Z. Istituto idrografico della Marina. The Center : [DMA, Combat Support center, DOA, distributor]. English. Public. Tyrrhenian Sea., Tyrrhenian Sea, Italy, Gaeta, Anchorage., and Formia.