|1. For maintaining mix in an undersea trench being dug by a jet trencher below critical density during descent of a pipe/cable
toward a bottom of the trench, a method comprising the steps of:
supplying liquid under pressure to at least one jetting conduit aligned and traveling aftward of the trencher along the bottom
of the trench: and
discharging the liquid under pressure received in the at least one jetting conduit radially from the at least one jetting
conduit at intervals along the length of the at least one jetting conduit into the trench.