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    On April 5,2020, fourth patch of two unit of boats, named “YI TUO 103” & “YI TUO 203”, which belongs to engineering vessels for Guinea Al-project, were smoothly sailing.
    The total length of the tugboat is 37m,type width 10.2m, type depth 4.5m,design draft 3.538m,speed 13.73kn,positive towing force 52.3t,backward towing force 48t.
    The total length of the pusher is 37m,type width of 14.4m,type depth of 5.1m,design draft of 3.7m,speed of 11.83kn,bollard towing force of 41.6t.