1200 GT Coaster Vessel is designed to mobilize the flow of goods and passengers in order to implement the Indonesian Sea Toll Program. This vessel is necessary to be analysed its stability to ensure the safety while in operation. The stability is analysed, firstly by theoretical approach (preliminary stability) and secondly, based on inclining test data to derive the final stability. The preliminary stability is analysed for the estimated LWT of 741.20 tons with LCG 23.797 m from AP and VCG 4.88 m above the keel. On the other hand, the inclining test results present the LWT of 831.90 tons with LCG 26.331 m from AP and VCG 4.513 m above the keel. Stability analysis on for both data is performed by considering the standard reference of IMO Instruments Resolution A. 749 (18) Amended by MSC.75 (69) Static stability, as well as guidance from Indonesian Bureau of Classification (BKI). Results of the analysis indicate that the ship meets the stability criteria from IMO and BKI. However results of preliminary stability analysis and final stability analysis exhibit a difference in the range 0.55% to 11.36%. This put forward better result from the final stability analysis due to the less accuracy in preliminary stability computation.

ABSTRAK  Pantai Cemara merupakan salah satu pantai yang potensial untuk wisata di kota Balikpapan. Belakangan mulai dikembangkan oleh warga sekitar dan dinas pariwisata sebagai pantai wisata. Namun masih kalah pamor dari pantai lainnya. Berdasarkan hasil survey yang dilakukan ditemukan bahwa pengelolaan dan fasilitas pendukung belum maksimal. Ditambah kurangnya kesadaran masyarakat serta pengunjung menyebabkan pantai ini seringkali nampak kotor sehingga kurang menarik minat wisatawan. Kegiatan pengabdian ini dilakukan untuk memberikan kesadaran kepada warga terkait kebersihan lingkungan, pengelolaan sampah, dan mempromosikan Pantai Cemara sebagai pantai wisata yang menarik untuk dikunjungi. Rangkaian kegiatan revitalisasi dilakukan secara daring dan luring. Kegiatan daring berupa pengenalan Pantai Cemara ke media sosial lewat ajang lomba fotografi serta webinar terkait pengelolaan pariwisata khususnya pengolalaan sampah. Kegiatan luring mencakup aksi bersih pantai dengan warga sekitar, pengecatan dan penataan fasilitas wisata, demo dekomposisi sampah dengan komposter dan penyediaan tempat sampah. Hasil yang didapatkan dari pengabdian ini adalah Pantai Cemara mulai terkenal di sosial media terutama untuk generasi muda, masyarakat sekitar memahami cara membuat komposter sederhana dan aplikasinya, serta Pantai Cemara terlihat lebih bersih dan menarik. Kata kunci: Balikpapan, Komposter, Pantai Cemara, Pariwisata, Revitalisasi  ABSTRACT Cemara Beach is one of the potential beaches for tourism in the city of Balikpapan. Later it began to be developed by local residents and the tourism office as a tourist beach. But still less prestige than other beaches. Based on the survey results, it was found that the management and supporting facilities were not optimal. Coupled with the lack of public awareness and visitors, this beach often looks dirty so it does not attract tourists. This service activity is carried out to provide awareness to residents regarding environmental cleanliness, waste management, and promoting Cemara Beach as an attractive tourist beach to visit. A series of revitalization activities are carried out online and offline. Online activities include introducing Cemara Beach to social media through photography competitions and webinars related to tourism management, especially waste management. Offline activities include cleaning the beach with local residents, painting and arranging tourist facilities, demos of composting waste decomposition and providing trash cans. The results obtained from this service are that Cemara Beach is becoming famous on social media, especially for the younger generation, the surrounding community understands how to make a simple composter and its application, and Cemara Beach looks cleaner and more attractive.Keywords: Balikpapan, Komposter, Cemara Beach, Tourism, Revitalization

Dock C is one of the supporting facilities at PT. Petrokimia Gresik which functions as loading and unloading goods from ships to land and vice versa. Another benefit of the jetty is that it can significantly increase the company's production capacity. Dock C PT. Petrokimia Gresik. In the treatment of sedimentation in port it is necessary to analyze the current pattern and sedimentation rate early, because this is the first step to predict the amount of sedimentation contained in the port in a certain period of time. Several ways can be done to minimize the rate of sedimentation, one of which is the layout of Dock C to reduce the frequency of dredging. This study compares the sedimentation volume at the existing condition jetty and two alternative jetty that occur due to currents and waves, while modeling is done using Mike 21. The results of the existing jetty modeling show the sedimentation volume for 12 months was 20641.68 m3. Whereas the sedimentation volume from alternative jetty 1 and 2 produced for 12 months was 11293.56 m3 and 7426.2 m3. Modifications to the layout of the jetty provided were able to reduce the rate of sedimentation in Dock C, with the most optimal sedimentation volume for 12 months at 13215.48 m3