Research on the hydrographic survey cycle for updating navigational charts

Abstract

Due to the vast ocean area and limited human and material resources, hydrographic survey must be carried out in a selective and well-planned way. Therefore, scientific planning of hydrographic surveys to ensure the effectiveness of navigational charts has become an urgent issue to be addressed by the hydrographic office of each coastal state. In this study, a reasonable calculation model of hydrographic survey cycle is established, which can be used to make the plan of navigational chart updating. The paper takes 493 navigational charts of Chinese coastal ports and fairways as the research object, analyses the fundamental factors affecting the hydrographic survey cycle and gives them weights, proposes to use the BP neural network to construct the relationship between the cycle and the impact factors, and finally establishes a calculation model of the hydrographic survey cycle. It has been verified that the calculation cycle of the model is effective, and it can provide reference for hydrographic survey planning and chart updating, as well as suggestions for navigation safety.

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

“…A hydrographic survey is a procedure for surveying marine waters and underwater topography to ensure the safety of navigation [1]. It is carried out according to the standards and specifications defined by the International Hydrographic Organization (IHO) [2,3].…”

From electronic navigational chart data to sea-bottom models: Kriging approaches for the Bay of Pozzuoli

“…The knowledge of the seabed conformation allows not only safe navigation [1], but also the development of new frontiers for other kind of studies such as those on directions and intensity of currents [2], sensitivity of habitats and species [3], [4], and other activities such as maintenance dredging [5], coastal infrastructure protection [6] etc. It is therefore obvious that knowing the seabed and its variability is a fundamental requirement in marine studies.…”