THE oil rig that has dominated the horizon off City Beach all summer is on the move. The almost 40,000-tonne Ocean Monarch drilling rig owned by Texas-based Diamond Offshore has been parked off the Perth coast for about three months undergoing maintenance work. Two SolstadFarstad anchor handling tug supply vessels have taken three days to recover the eight 15-tonne anchors that have been holding the 105m wide deep-water platform in place. The vessels, the Far Statesman and Fa