Members of Navatek Ltd., a ship-building company, prepare the Ultra Heavy-lift Amphibious Connector (UHAC) to begin its first-ever test run in Honolulu Harbor here, March 3. The Marine Corps Warfighting Lab came here to observe the UHAC's capabilities in land and water. - Members of Navatek Ltd., a ship-building company, prepare the Ultra Heavy-lift Amphibious Connector (UHAC) to begin its first-ever test run in Honolulu Harbor here, March 3. The Marine Corps Warfighting Lab came here to observe the UHAC's capabilities in land and water.