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All Journal Jurnal Ilmu Kelautan Spermonde Jurnal Pengelolaan Laboratorium Pendidikan Jurnal Lemuru : Jurnal Ilmu Perikanan dan Kelautan Indonesia Authentic Research of Global Fisheries Application Journal (Aurelia Journal) International Journal of Marine Engineering Innovation and Research Nekton Jurnal Manajemen Bisnis Transportasi dan Logistik Jurnal Airaha Buletin SWIMP
Yani Nurita Purnawanti
Politeknik Kelautan Dan Perikanan Sorong
Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation Veterinary

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Feasibility Study of a Solar Powered Semi-Submarine (KMP. Mnaibori) as a Model of Sustainable Marine Ecotourism in Raja Ampat Purnawati, Yani Nurita; Pujianto, Andreas; Puspitasari, Asthervina Widyastami; Kurniati, Wenty; Firman, Sri Wahyuni; Sirait, Egbert Josua
Nekton Vol 5 No 2 (2025): Nekton
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v5i2.1089

Abstract

This study describes the KMP. Mnaibori, a 14-meter semi-submarine catamaran designed for the waters of Raja Ampat as a model of sustainable marine ecotourism. The objectives are to present the vessel’s design specifications, integrate a hybrid solar–energy system, and assess the financial feasibility and strategic aspects of its development. The methodology includes technical design analysis based on stability, comfort, and underwater observation experience; solar power system performance estimation using the peak sun hours and energy loss factor approach; and financial analysis using Payback Period (PP), Net Present Value (NPV), Profitability Index (PI), Internal Rate of Return (IRR), Break-Even Point (BEP), and Return on Investment (ROI) with a 12% discount rate over a 5-year horizon. The results show that with a solar panel area of 49 m² (38 modules @200 W), the system can generate 21.66 kWh per day. Economically, the project is feasible with a positive NPV of IDR 4.44 billion, a BEP at 12.11 passengers/day (33.6% occupancy), ROI of 49.85% per year, and IRR between 42–45%. SWOT analysis highlights the vessel’s strengths in innovative design and energy efficiency, opportunities in ecotourism growth and green financing support, and challenges related to fuel dependency and weather variability. Development strategies are directed toward service differentiation, solar energy optimization, and enhancing local maintenance capacity.
IMPLEMENTATION OF A WEB-BASED REAL-TIME MONITORING SYSTEM FOR VIBRATION, TEMPERATURE, AND NOISE OF REFRIGERATION MACHINES WITH MICROCONTROL Abrori, M. Zaki Latif; Demeianto, Bobby; Idrus, Muhamad Amril; Marsono, Marsono; Arafat, Yasser; Hermawan, Ade; Nurita, Yani
Aurelia Journal Vol 7, No 2 (2025): October
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/aj.v7i2.18186

Abstract

Real-time monitoring of vibration, temperature, and noise in refrigeration machines using microcontrollers is still rarely discussed, although it plays a crucial role in maintaining machine performance and supporting decision-making for predictive maintenance. This research aims to design and implement a microcontroller-based monitoring system capable of measuring and recording machine operational parameters in real-time with adequate accuracy. The system uses an accelerometer sensor for vibration detection, an infrared thermometer for temperature measurement, and an electret microphone for noise monitoring. The data is processed by a microcontroller equipped with an SD card module for storage and a WiFi connection for remote access via the web. The test results show that this device can detect changes in vibration with an Mean Absolute Error value of 0.34 m/s², temperature with a Mean Absolute Percentage Error value of 1.35%, and provides real-time data that can be accessed wirelessly through other devices connected to the WiFi network. The contribution of this research lies in providing a monitoring solution that improves operational efficiency, minimizes the risk of downtime, and supports the optimal management and maintenance of refrigeration machines. 
Integrity and Safety Factors of Asymmetric Mooring Line Arrangement on Ocean Farm ITS Yeyes Mulyadi; Yani Nurita Purnawanti; Haryo Dwito Armono; Mohammad Hilmy Mahdyansyah; Muhammad Rizky Syarifudin
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 3 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.4910

Abstract

An offshore aquaculture model called OFITS has been designed to be installed in the Indonesia Ocean. The OFITS structure consists of an underwater fish cage and living quarters at the superstructure. An asymmetric mooring line arrangement is proposed to be applied at OFITS. This paper aims to analyze the integrity and safety factor of the asymmetric mooring line arrangement used on OFITS in the presence of environmental load. The proposed asymmetric mooring line arrangement has 14 lines with a specified configuration. There are 10 mooring lines installed on the front side in line with the incoming waves and 4 others installed behind the cage. A nylon line with a diameter of 42 mm and a length of 70 m is used as the mooring line attached to a steel anchor weighing 0.25 tons. The analysis method for the moored cage motion uses the time domain analysis. The mooring line's integrity analysis results show that the maximum tension result is 18.55 tons, with a safety factor of 2.07. It can be concluded that the proposed asymmetric arrangement mooring has good integrity and meets the safety factor requirements of the DNVGL standard, with a minimum safety factor of 1.45.
Co-Authors Abrori, M. Zaki Latif Ade Hermawan Ahmad Nurfauzi Arisandi, Defrian Marza Armono, Haryo Dwito Asmira Rumalolas Bagas Prakoso Boby Wisely Ziliwu Dahlan Dahlan Debrina Alfitri Kentania Demeianto, Bobby Dheni Rossarie Djoko Prasetyo Egbert Joshua Sirait Egbert Josua Sirait Fattah, Nurlaeli Handayan Handayani Handayani - Haryo Dwito Armono Hasan Ikhwani Idrus, Muhamad Amril Kurniati, Wenty Leoni Hayu Sabrina Putri Mahdyansyah, Mohammad Hilmy Marsono Marsono Mohammad Hilmy Mahdyansyah Muh Guntur Ketuut Muh Kasim Muh. Kasim Muhammad Rizky Syarifudin Muhfizar, Muhfizar Mulyadi, Yeyes Nur Anjelika Saputri Nurfauzi, Akhmad Nurfitri Rahim Nurpajriani Nurpajriani Nurul Huda Poltak, Hendra Pujianto, Andreas Pujianto, Andreas Pundi Ramadhan Sudrajat Puspitasari, Asthervina Widyastami Renaldo Fredly Rumaherang Rezza Ruzuqi Ristiana Dwi Cahyani Rumaherang, Renaldo Fredly Sepri Simon Manutilaa Sirait, Egbert Josua Sri Wahyuni Firman Syarifudin, Muhammad Rizky Yasser Arafat Yeyes Mulyadi Zakeus Wuarbanaran