Copyright Holder: This Article is Licensed Under: © Amad, Ria, Ilman(2023) Corresponding author’s email: amad_narto@pip-semarang.ac.id; ria.hs@pip-semarang.ac.id; ilmanalfahrobi@gmail.com RSF Conference Proceeding Series: Engineering and Technology, Vol. 3 No. 1 (2023) https://doi.org/10.31098/cset.v3i1.729 Developing Application Main Condensate Water System as a Learning Media Amad Narto 1 , Ria Hermina Sari 1 , Ilman Al Fahrobi 1 1 Politeknik Ilmu Pelayaran Semarang, Indonesia Received: Aug 29, 2023 Revised: Sept 15, 2023 Accepted: Sept 27, 2023 Online: Oct 5, 2023 Abstract An innovation of learning media through application is the answer to the learning challenges in the digitalization era as well as the impact of the COVID-19 pandemic. In this study, the main condensate water system is transformed into a learning media application for simulating the work process, distribution flow, and operation of the main condensate water system on board a ship. This study applied a research and development method using a five-stage research model known as “Mantap”. The study was started by conducting an initial study and followed by model development through designing the basic concept of the application. Validation and effectiveness assessments were then conducted to determine whether the application was valid and applicable enough as learning media. The study revealed that the application visualized using Adobe Animate is valid as a learning media. It gained a validity score of 3.25 from the visual design expert and 3.5 from the curriculum experts. Besides, the application was assessed to be effective as a learning media by receiving a validity score of 3.69 from the Marine Engineering students. Keywords learning media, main condensate water system, Mantap research method INTRODUCTION The essential purpose of learning was empowering students’ potential into competence through a learning process that involved a direct interaction between student and lecturer through learning media. Besides, technological advance impacts the pattern of learning media that supports the students' study with different methods to gain effective learning (Sajidan, et al., 2020). However, the rough wave of the COVID-19 pandemic changed the ideal pattern of the learning process through "physical distancing" by limiting crowds' activities, including direct learning activities at school causing all learning processes must be accessed online (Astini, 2020). To prepare students for a pandemic, schools and government should be able to supply alternative learning media, such as E-learning. (Mailizar, et al., 2020). On the other hand, the distance and connectivity limitations may affect the student's comprehension of the courses, particularly for students who need direct observation and practice in the laboratory, workshop, or simulator which could lead to depression and anxiety (Kalok, et al., 2020). In some cases, students' perception and interest in e-learning showed an average level, meaning it was not fully implemented (Hidayat, 2020). Providing adequate and well-planned learning media was the best solution for facing the challenge (Al-Juda, 2017). Research Paper