An AP Moller-Maersk tanker was one of four ships to avoid hijacking off Somalia as the use of motherships continues to aid pirates.
A Claus-Peter Offen tanker and an Indian aframax also fended off attacks while crew of a Hong Kong-operated ship beat off a boarding attempt by hurling oil drums overboard on top of pirates.
The Danish-owned 109,800-dwt products tanker Maersk
