Survey team participated in a seminar on water depth surveying technology (CHC Marine Day) with topics such as: - Technology for water depth surveying using automated survey vessels (USV) equipped with Single Beam Echo Sounder. - Technology for water depth surveying using automated survey vessels (USV) equipped with Multi-beam systems. - Comparison of data differences between Single Beam and Multi-beam. - Application of Echo Sounder data in conjunction with LiDAR survey technology data. Demonstration of the operation of the automated water depth surveying system, CHC brand model Apache 4+ Multibeam. - Hands-on experience with a GNSS satellite signal receiver with positioning functions from images, and using cameras for AR stake-out planning."