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DIMENSION OF SEAMOUNT USING MULTIBEAM ECHOSOUNDER IN BENGKULU WATERS Fahrulian, Fahrulian; Manik, Henry; Hartoyo, Djoko
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 5 No. 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1149.319 KB) | DOI: 10.29244/jitkt.v5i1.7754

Abstract

The purpose of this research was to determine the dimensions of seamount using echosuonder in Bengkulu waters.  The survey was conducted by BPPT, LIPI, the Ministry of Energy and Mineral Resources, CGGVeritas, and the Institut de Physique du Globe (IPG) Paris in the southwest of the Sumatera island on 18-19 December 2010. Two  acoustic instruments were  used i.e., ELAC Seabeam 1050D with a frequency of 50 kHz and Simrad EM 12D with a frequency of 12 kHz.  Data acquisition was obtained by using the hydrostar software in Baruna Jaya 3 and 4 research vessels. CARIS HIPS and SIPS6.1 softwares were used toprocess the data of bathymetry. Amplitude and backscatter data were obtained by data processing on the MBSystem. Data visualization in 3-D was performed using the Fladermaus 6.2 software (personal license of Djoko Hartoyo). Seamount form was assumed as a cone with an elliptical base to calculate the dimensions. The result showed an under water seamount of 320 Km from the southwest of Bengkulu city at -4°22?9.16??latitude and 99°25?01.47?? longitude. The seamount height was ± 3,968 meters and had two peak separated at ± 3,050 meters. Seamount peaks located at ± 1.270 meters below sea level. The major axis was ± 50,240 meters and the minor axis in this seamount was ± 5,644 meters Keywords: seamount dimension, bathymetry, backscattering, Bengkulu Waters
MIGRASI VERTIKAL ZOOPLANKTON DI LAUT BANDA Moniharapon, Domey; Jaya, Indra; Manik, Henry; Pujiyati, Sri; Hestirianoto, Totok; Syahailatua, Augy
Jurnal Kelautan Nasional Vol 9, No 3 (2014): DESEMBER
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (933.404 KB) | DOI: 10.15578/jkn.v9i3.6211

Abstract

Analisis migrasi vertikal zooplankton di Laut Banda telah dilakukan berdasarkan nilai hambur balik akustik yang diperoleh dari pengukuran pada tanggal 21-30 November 2013 menggunakan instrument akustik simrad EK 500 yang dipasang pada Kapal Riset Baruna Jaya VII. Hasil analisis menunjukan migrasi vertikal zooplankton di Laut Banda merupakan fungsi dari waktu dan konsentrasi klorofil. Agregasi zooplankton berada pada lapisan permukaan 0-25 meter untuk setiap waktu pengamatan, bersamaan dengan nilai konsentrasi khorofil yang tinggi yakni mencapai 2,1 mg/m3. Nilai volume hamburan balik akustik rerata pada strata kedalaman 0-25 meter adalah -84,31 dB, pada kedalaman 25-50 meter sebesar -82,02 dB dan pada kedalaman 50-75 meter sebesar -83,9 dB.
RANCANG BANGUN TRANSMITTER DAN RECEIVER UNTUK SISTEM KOMUNIKASI AKUSTIK BAWAH AIR Manik, Henry; Susilohadi, Susilohadi; Kusumah, Billi R
Jurnal Rekayasa Elektrika Vol 15, No 3 (2019)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1555.57 KB) | DOI: 10.17529/jre.v15i3.14498

Abstract

Since 2016 acoustic detection technology for marine resources had been developed which was relatively simple and sophisticated, namely Ocean Acoustic Waveguide Remote Sensing. The technology was useful for monitoring and quantifying underwater targets such as marine resources and the environment that can be conducted continuously, sustainable, in situ, real-time, and low cost. This research had designed an Ocean Acoustic Remote Sensing technology instrument to detect signal propagation range. The step taken in this research was to build an acoustic device system such as transmitter and receiver based on TR-103 transmitting transducer sensor and Benthos Aq-1 receiving transducer. Based on the experiment results, the transmitter and receiver designed were confrmed with the measured piezoelectric quantity specifcations. The results at open ocean in the Thousand Islands showed the detection range of transmitter signal propagation to the receiver was 100 m.