| Summary: | Bathymetric mapping is needed in order to provide geo-spatial information for planning and decision
making activities related to information of inland and marine waters. There are various technologies
that can be used to generate the bathymetric data, one of them is by using a single beam echo sounder
(SBES). There are two types of SBES , ie standard single beam echo sounder and fish finder. Fish finder
is a low cost alternative depth gauges, but the resulted accuracy based on the existing specifications is
lower, compared to the standard SBES. Nevertheless it is necessary to compare the bathymetric data
measured using both those tools. It was performed in order to provide a comparative picture, whether
the quality of the data measured by the fish finder and a standard SBES are different or not, by
following the referral standardization IHO SP - 44 in 2008 and ISO 7646 in 2010. The works in this
study consist of the measurement scenario design, equipments configuration, calibration barcheck,
sounding (data collection), data processing , quality testing, and comparison of the depth data refers to
the IHO and SNI standardizations. Based on the results of quality testing of the depth data measured by
both fish finder and standard SBES, the resulted depths meet IHO and SNI standardizations for both
uniform and varied depth areas. When viewed from the position of the placement of standard SBES and
fish finder transducers in term of statistical test with a confidence level of 95 %, transducers placed
side by side will produce different data statistically. However if the transducer placed on opposite left
and right side of the ship will result in data that are not statistically different. In term of precission,
transducers placed side by side produced better result than opposite position
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