Perpustakaan Digital ITB

Hydrographic surveys are inherently subject to errors. To ensure the highest quality of the resulting seafloor model, the International Hydrographic Organization (IHO) provides a set of standards known as the IHO S-44 Standards to support the design, data acquisition, and quality assessment of a hydrographic survey project. Problems arise when the hydrographic survey is conducted portably on a non-standard survey vehicle. Individual performance analysis of each survey instruments involved in a hydrographic survey must be assessed, as well as the installation and integration of the whole survey system. Therefore, this study aims to assess the total propagated uncertainty of a portable hydrographic survey on a non-standard vehicle to ensure adherence to the IHO S-44 Standards. To obtain the total propagated uncertainty of the portable survey system, we indicate nine parameters that affects the error budget both horizontally and vertically. Each parameter is assessed using static and dynamic measurements across various seafloor morphology in the vicinity of the Pramuka Island, DKI Jakarta. The study finds that GNSS positioning error using the Njord receiver after convergence reaches 0.2121 ± 0.0769 meters horizontally, while SBES depth measurements showed increasing variability beyond 30 meters with standard deviations up to 0.71 meters. MBES-derived DEM exhibits vertical error range between 0–4 meters, with standard deviation values in slope areas remaining under 0.5 - 1 meters, indicating stable performance in deeper morphology. The Side Scan Sonar (SSS) performance showed high-resolution capabilities at 0.1 m/pixel and a swath width of 101.7 meters, with consistent seafloor feature detection across opposing tracks. These results suggest that a careful estimation of the error budget will support a portably conducted hydrographic survey on a non-standard vehicle to adhere to the IHO S-44 Standards.