A Novel Method on Hydrographic Survey Technology Selection Based on the Decision Tree Supervised Learning

Abstract

Hydrographic survey or seabed mapping plays an important role in achieving better maritime safety, especially in coastal waters. Due to advances in survey technologies, it becomes important to choose well-suited technology for a specific area. Moreover, various technologies have various ranges of equipment and manufacturers, as well as characteristics. Therefore, in this paper, a novel method of a hydrographic survey, i.e., identifying the appropriate technology, has been developed. The method is based on a reduced elimination matrix, decision tree supervised learning, and multicriteria decision methods. The available technologies were: remotely operated underwater vehicle (ROV), unmanned aerial vehicle (UAV), light detection and ranging (LIDAR), autonomous underwater vehicle (AUV), satellite-derived bathymetry (SDB), and multibeam echosounder (MBES), and they are applied as a case study of Kaštela Bay. Results show, considering the specifics of the survey area, that UAV is the best-suited technology to be used for a hydrographic survey. However, some other technologies, such as SDB come close and can be considered an alternative for hydrographic surveys.

The State of the Hydrographic Survey and Assessment of the Potentially Risky Region for Navigation Safety

“…Within the hydrographic and bathymetric survey field, some studies were based on the methodology of survey planning [10,[34][35][36]. They emphasized the importance of defining priorities that would ultimately reduce risks and increase hydrographic surveying [35,36].…”

“…It is well-known that the importance of hydrographic surveys is related to obtaining accurate data. Also, it is to make nautical charts and navigation publications with particular emphasis on the possibilities that may affect the safety of navigation [5,6]. Navigation charts are essential tools for marine navigation, especially when it is known that more than 80% of international world trade occurs at sea [7,8].…”

“…Most charts contain a mixture of surveys of differing quality or rely on data from hydrographic survey methods that were limited. Although current technical and technological solutions for implementing a hydrographic survey demonstrate high development, they are incomplete and inaccurate [3,[10][11][12].…”

Theoretical and Experimental Aspects Regarding the Forced Mounting of a Cylinder Containing the Electronics of a Mini Submarine

“…It being a collaborative robot that communicates independently with a senile ground robot to perform complex intervention and rescue missions [38,39]; • It having an increased energy resource with lithium-ion (Li-Ion) batteries (14.8 V, 18 Ah), which gives it increased autonomy [40]; Its originality is given by several elements, such as:…”

“…• It being a collaborative robot that communicates independently with a senile ground robot to perform complex intervention and rescue missions [38,39];…”