20100611111800.0 1105-7947 1105-7947 Tropis - Hellenic Institute for the Preservation of Nautical Tradition. Tropis - Hellenic Institute for the Preservation of Nautical Tradition Tropis - Hellenic Institute for the Preservation of Nautical Tradition. Greece 1105-7947 1105-7947 Tropis - Hellenic Institute for the Preservation of Nautical Tradition 1105-7947