Complex sentence: To train Japanese sailors in the use of these new and powerfull ships the Nagasaki Naval Training Center was established literally right at the entrance of Dejima, to maximize interaction with Dutch naval know-how.
Split into simpler sentences: To train Japanese sailors in the use of these new and powerfull ships the Nagasaki Naval Training Center was established literally right at the entrance of Dejima. To maximize interaction with Dutch naval know-how.