Complex sentence: The ice-breaking Knik Arm Ferry, Knik_Arm_ferry specially built by the U.S. Navy and currently undergoing sea-trials, is on hold and awaiting resolution of disputes about the location of the dock on the Anchorage side.
Split into simpler sentences: The ice-breaking ferry was specially built by the U.S. Navy and is currently undergoing sea-trials. That project is on hold and awaiting resolution of disputes about the location of the dock on the Anchorage side.