An oil tanker that had to anchor off Bermuda’s coast for more than three days due to broken tug boats finally arrived on Saturday morning.Butterfly arrived in Bermuda’s waters on Tuesday afternoon from the Bahamas to deliver fuel for Belco.However, it was unable to berth at the oil docks in St George’s because two of the Island’s three tugs had broken down. The bill for the wasted time will have to be footed by Belco.Butterfly eventually managed to discharge its load on Saturday after the newly-repaired tug Edward M Stowe and Powerful, which remained in service, escorted it in.It set sail back to the Bahamas yesterday lunchtime.Belco has declined to comment on the cost of the delay.