English for Specific Purposes (ESP) is a type of language learning which has its focus on all aspects of language pertaining to a particular field of human activity. This research is conducted on the basis of applying ESP in Teaching-Learning of English for Nautical Sciences. The objectives of this study are aimed to explain the teaching-learning of English for nautical sciences, to analyze the barriers faced in the teaching-learning of English for nautical sciences, and to explain the problem solving of barriers faced in the teaching-learning of English for nautical sciences. The method of this research is qualitative research. It is based on the research focus to find out teaching-learning of English for nautical sciences at the second grade of SMK PELAYARAN “AKPELNI” Semarang. For collecting data, it based on qualitative analysis data which used the observation, documentation, and interview. As the results of the analysis, it showed that Teaching-learning of English for nautical sciences at SMK Pelayaran Semarang uses the 2013 curriculum by combining of Education Minister and Communication Minister. Besides that, the students barrier are limitation vocabulary. The way to solve the problem is the teacher should ask students to memorize the code and instruction communication of Maritime English, it’s so complicated and should use to daily operation at the ship. She should also give motivation to the student for hard study.