Proceedings of the 10th national technical seminar on underwater system technology 2018 NUSYS 18 - Abdullah, Nor Rul Hasma; Ahmad, Hamzah; Mat Noh, Maziyah; Md Zain, Zainah; Mustafa, Mahfuzah; Pebrianti, Dwi; Samad, Rosdiyana (Lecture Notes in Electrical Engineering, 2019)