Mobile Tide and Water Level Instrument (MOTIWALI) adalah alat pengukur fluktuasi ketinggian muka air atau pasang surut menggunakan gelombang suara (acoustic tide gauge). Penelitian ini bertujuan untuk mengidentifikasi faktor pembatas dan akurasi pembacaan instrumen MOTIWALI. Perambatan suara dipengaruhi oleh kondisi suhu udara dan densitas medium sebagai bidang pantul (backscatter). Uji coba pembacaan dilakukan dengan 3 kelompok densitas medium yang berbeda (air laut, air tawar dan air payau) serta perlakuan posisi ketinggian tranduser terhadap permukaan medium uji coba (5 perlakuan). Kesesuaian pembacaan jarak oleh transduser dan interval perekaman dianalisis menggunakan ANOVA dan analisis komponen utama (PCA). Hasil analisis memperlihatkan, instrumen tidak memberikan perbedaan pembacaan jarak transduser terhadap permukaan medium uji coba dengan densitas yang berbeda, namun berbeda pada interval perekaman data yang telah ditetapkan pada confiq.sys. MOTIWALI efektif bekerja pada jarak 150 cm dari permukaan medium dan penetapan waktu perekaman ditambahkan selama 1 menit tiap perencanaan pengukuran dengan interval waktu perekaman tertentu.
The movement of celestial bodies produces a variation of a gravitational gradient as a tidal generation force (GPP). Position Sabang Station, declination maximum and position lunar month of Muharram aka n generate harmonic constituent character identifier of GPP, where the water level is the sum of the amplitude of harmonic constituent that generated at a certain time.This research is to determine the variation of harmonic constituents and identify the character of harmonic constituents of GPP component position characterization in Muharram month. The results show Katrakteristik tidal movement beginning of the month of Muharram in Sabang Station occurred 1-2 hours after ijtimak.. Value riding dominant water derived from the value of Mean Sea Level ( 52%), and the dominant contribution hamonik constituents derived from component M 2 (28 - 33%). Harmonic constituents M 2 does not show the position of the moon in Muharram, while the position of the sun is reflected in the constituent phase harmonic S 2..
Mare Island is a strategic small island, both in its location and its natural resources. In the Regional Regulation of North Maluku Province Number 2 of 2018 concerning Zoning Plans for Coastal Areas and Small Islands of North Maluku Province for 2018-2038, Mare Island is designated as Coastal and Small Islands Conservation Areas. Furthermore, through the Decree of the Minister of Marine and Fisheries Affairs Number 66/KEPMEN-KP/2020, Mare Island has been designated as a Marine Conservation Area. The research aims to formulate a strategy for developing marine conservation areas on Mare Island. Field data collection was carried out in the form of observations, interviews and questionnaires, analysis of existing spatial conditions using the Geographic Information System (GIS), for strategy formulation using SWOT analysis tools after identifying various internal and external factors. external strategy, while the alternative strategy is continued by determining the priority of the strategy using the Analytical Hierarchy Process (AHP). The results showed that there were 11 alternative formulations of strategies for development of Mare Island marine conservation areas in order of priority: Improved conservation area management, Capacity building for government and community organizations, Implementation of Zoning Plans and Preparation of Detailed Spatial Plans, Economic empowerment and development of alternative livelihoods, Partnership network improvement, Improvement of tourism facilities and infrastructure, Collaboration of programs among local government offices, Structuring residential areas, Limiting the use of SDKP, Law enforcement and Development of sea and land transportation facilities.
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