Marine surveying

Pier and channel topographic surveying, seabed geomorphological surveying, submarine pipeline inspection, submarine cable inspection, reservoir capacity measurement, underwater trenching and laying inspections, scour analysis of underwater structures, and underwater geophysical exploration, among others.

Equipment involved:

GNSS receivers, sound velocity profilers, tide gauges, single-beam echo sounders, multibeam echo sounders, fiber-optic gyrocompasses, side-scan sonars, sub-bottom profilers, and magnetometers, among others.

Shenzhen Haiyi Petroleum Technology Co., Ltd. boasts a professional team certified in marine surveying and mapping. The company has independently developed a high‑precision Global Navigation Satellite System (GNSS), a specialized quality‑control system for marine surveying projects, and navigation‑positioning software. Leveraging its extensive experience in marine surveying, the company is capable of providing end‑to‑end services for marine engineering surveys.

Service Case:

Commissioned by the Guangdong Provincial Marine Development Planning Research Center, the project on seabed and island topography and geomorphology survey (Zhanjiang–southern Maoming) and nearshore seabed sediment type survey from Yangjiang to Maoming was undertaken by China Energy Engineering Group Guangdong Electric Power Design Institute Co., Ltd. Haiyi was contracted to conduct bathymetric and topographic surveys in a designated area, carrying out field data acquisition, processing, mosaicking, integration, topographic and geomorphic analysis, as well as the preparation of maps and reports.