Judul: Bathymetry Mapping for  Pioneer Ship Voyages Using Side Scan Sonar in Sembulang Waters, Riau Islands.
Abstrak: The SSS C-MAX CM2 Tow fish instrument is an acoustic instrument that operates at a frequency of 325 kHz with a maximum sounding distance of 200 m, towing cable length of 50 m, producing images and textures within a large area. This study aims to process data from the SSS C-max CM2 measurement survey to obtain MSL and LLWL tidal corrected bathymetry data, which is used to create a sailing map for pioneer ships in Sembulang waters, Riau Islands. The SSS data acquisition was carried out on March 15-18, 2021, in Sembulang waters using a 5GT vessel together with a team from the Batam State Polytechnic. Tidal data was taken using a tidal board placed at Sembulang Pier. SSS data processing uses Sonar Wiz 7 licensed software obtained from Pushidrosal with the application of several geometric and radiometric corrections. Geometric corrections include lay back, bottom tracking, and slant range correction. Radiometric correction consists of Beam angle Correction (BAC), Automatic Gain Control (AGC), Time Varying Gain (TVG), and Empirical Gain Normalization (EGN). Tidal data is processed using the Admiralty method. SSS data is exported into .csv format for making topographic maps of the seabed based on the depth and width of the ideal shipping lane based on the specifications of traditional fishing vessels used at the research site. The actual depth value of the Sembulang waters ranges from 0,5 meters to 27,7 meters. The depth of the waters towards the east is getting deeper. The depth value of the Sembulang waters in LLWL conditions ranges from 0 meters to 26,5086 meters, so several locations need to be avoided when sailing for the location of the study waters, it is recommended that dredging be carried out for the safety of ships ≥ 5GT., Instrumen SSS C-MAX CM2 Tow fish merupakan instrumen akustik yang beroperasi pada frekuensi 325 kHz dengan jarak antar jalur pemeruman maksimum 200 m, panjang kabel towing 50 m, menghasilkan gambar dan tekstur dengan area yang luas. Penelitian ini bertujuan melakukan pengolahan data hasil survei pengukuran SSS C-max CM2 sehingga diperoleh data batimetri terkoreksi pasang surut MSL dan LLWL yang digunakan untuk membuat peta pelayaran kapal perintis di Perairan Sembulang, Kepulauan Riau. Akuisisi data SSS dilakukan pada 15 – 18 Maret 2021 di Perairan Sembulang menggunakan kapal berukuran 5GT bersama dengan tim dari Politeknik Negeri Batam. Data pasang surut diambil menggunakan papan pasut yang diletakan di Dermaga Sembulang. Pengolahan data SSS menggunakan perangkat lunak Sonar Wiz 7 berlisensi yang didapatkan dari Pushidrosal dengan penerapan beberapa koreksi geometrik dan radiometrik. Koreksi geometrik antara lain yaitu koreksi lay back, koreksi bottom tracking, dan koreksi slant range. Koreksi radiometrik terdiri dari koreksi Beam angle Correction (BAC), Automatic Gain Control (AGC), Time Varying Gain (TVG), dan Empirical Gain Normalization (EGN). Data pasang surut diolah menggunakan metode Admiralty. Data SSS dieksport ke dalam format .csv untuk pembuatan peta topografi dasar laut berdasarkan kedalaman dan lebar alur pelayaran ideal berdasarkan spesifikasi kapal nelayan tradisional yang digunakan di lokasi penelitian. Nilai kedalaman Perairan Sembulang sebenarnya berkisar antara 0,5 meter – 27,7 meter. Kedalaman perairan kearah timur semakin dalam. Nilai
Keyword: Bathymetry, Sailing Flow, Sembulang Waters, Side Scan Sonar, Tides