Two U.S. companies have submitted bids to operate ferry service between Portland and Yarmouth, Nova Scotia, to the Canadian province’s government, which is willing to provide as much as $21 million in subsidies. Neither Quest Navigation Inc. of Maine and Maritime Applied Physics Corp. of Baltimore currently offer ferry service. Nova Scotia’s government is expected to take a month to review the bids. The Portland Press Herald, says Bay Ferries Ltd., which operated a high-speed catamaran on the route from 2006 to 2009, did not submit a proposal. Maritime Applied Physics Corp. is an engineering and manufacturing firm with an office in Brunswick, Maine. The newspaper says little is known about Quest Navigation. The company is owned by a Maine man who couldn’t immediately be located for comment.