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COOEC owns a trenching vessel “HYSY 295”, which has a maximum operating depth of 300 meters. This vessel is a DP2 dynamically positioned trencher with a cruising range of 12,000 nautical miles and a maximum endurance of 60 days.

Meanwhile, COOEC has a series of jet trenching equipment that can perform conventional pipeline post-trenching, deep trenching, and excavation and exposure operations. The deepwater trencher is one of the Company’s trenching flagships capable of excavating 5.5m-deep trenches for pipelines with diameters up to 1,000mm. In addition, the Company has a jet-type cable trenching machine that can lay and bury submarine cables at 1.5-2.5m depths, a VMP500 plow trencher, and a QT1600 flexible pipe/cable trencher. The VMP500 plow trencher can operate at depths up to 500m and excavate trenches for pipelines with diameters ranging from 75mm to 1,420mm, and it is suitable for use on seabed with a soil shear strength of 30-400kPa. The QT1600 jet trencher can operate at depths up to 2,000m and excavate trenches for pipelines with diameters up to 800mm. It is suitable for seabed with a maximum soil strength of 100kPa and can be used for the laying and post-trenching of submarine pipelines and cables.