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All Journal Indonesian Journal of Maritime Technology or abbreviated (ISMATECH)
Putri, Destyariani
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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Network Planning Analysis on Loading and Unloading of the MV Future Ocean 14,514 DWT at Semayang Port Putri, Destyariani; Mahendra, Arya Putra; Wirawan, Muhammad Khaisar
Indonesian Journal of Maritime Technology Vol. 3 No. 1 (2025): Volume 3 Issue 1, June 2025
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v3i1.1319

Abstract

The process of loading and unloading ships is a critical activity in the logistics chain that impacts the efficiency and operational costs of ports. This study aims to evaluate the use of Network Planning methods in planning and controlling the time of the ship loading and unloading process. The research was conducted using historical data on the loading and unloading times of ships, as well as related activity schedules at Semayang Port, Balikpapan. This study adopts an approach by analyzing the application of network planning on the unloading process of the MV Future Ocean 14,514 DWT ship in the form of an S-Curve, then analyzing alternative critical paths along with duration acceleration using the Critical Path Method (CPM) and Program Evaluation and Review Technique (PERT) on days (conditions) with better work weight consistency. Additionally, it analyzes how this affects manpower and manhour efficiency. The results of this study indicate that the application of the CPM and PERT methods led to a reduction in job duration from 1.408 minutes to 1.227 minutes using CPM, and 1.224,67 minutes using PERT. Based on the duration acceleration, the need for additional manpower increased from 21 to 24, resulting in a -14% decrease in manpower efficiency. The total manhour value changed from 3.941,28 MH to 3.936 MH with a 0,13% increase in manhour efficiency for CPM, and 3.916,8 MH with a 0,62% increase in manhour efficiency for PERT.
Tidal Current Pattern Modeling in the Wain River Shipping Channel Waters Huda, Abiyani Choirul; Putri, Destyariani; Nurcholik, Samsu Dlukha; Hasrina
Indonesian Journal of Maritime Technology Vol. 2 No. 1 (2024): Volume 2 Issue 1, June 2024
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v2i1.8481518

Abstract

Semi-enclosed waters surrounded by islands such as Balikpapan Bay, whose waters are influenced by the dynamics of sea tides which affect current speed. Therefore, to understand the pattern and circulation of ocean currents in Balikpapan Bay, especially in the Wain River shipping channel, one way is by hydrodynamic modeling. The water area on the Wain River is an area related to shipping lanes as a shipping route at the Ferry Port. This research on current speed and direction aims to further research on maintaining the depth of shipping lanes due to sedimentation around the Ferry Harbor waters. Therefore, researchers conducted an initial study to create a simulation model of tidal current patterns using Mike 21 software with the aim of finding out what the tidal current patterns and current directions are in the waters of Balikpapan Bay as further data for maintaining the depth of shipping lanes. The data processing used is based on primary data in the form of current speed and direction, and tides and secondary data in the form of depth, current speed and direction, and tides, which are then validated using the RMSE method and to determine the type of tide using the Almilarty method. The results of this research are modeling tidal flow patterns and mapping changes in the morphology of the Wain River. The current speed at high tide ranges from 0.1 m/s to 0.4 m/s, while the current speed at low tide ranges from 0.1 m/s to 0.2 m/s. The depth of the waters around the Wain River is 1 m to 5 m. The tidal type in the waters of the Wain River is a mixed daily double bias.
Co-Authors Hasrina Huda, Abiyani Choirul Mahendra, Arya Putra Samsu Dlukha N Wirawan, Muhammad Khaisar