Rosyn with the Netherlands. Roslyn with the Netherlands.
Operations would start around the time that the Westminster government.
That could make such a road to vital link for freight, if there are delays on crossings further south.
The ferry service would run between the Fife port and Groningen Seaport at Eemshaven, in the far north of the Netherlands near the German border.
RTV Noord, David Kellas, director at TEC Offshore.
He explained the Perthshire-based company already has a wide portfolio of offshore activities.
These include drill ships, floating oil and gas production vessels and floating accommodation for offshore workers.
He told BBC Scotland: "Eeemshaven is a more central port than people give it credit for".
However, it is not usually used for passenger services, and
The operation would involve two charter ships, each carrying up to 2,000 passengers.
There was a passenger ferry between Rosyth and Zeebrugge in Belgium between 2002 and 2010. It became a freight-only operation until 2018.
"This would be a daily crossing, which is fantastic," said Margaret Simpson, head of policy for Scotland & Northern England at the Freight Transport Association.
She told Reuters news agency the idea had been under consideration for some time and might have been meaningless if there were no Brexit.
But in light of Brexit "it makes a lot of sense, given the potential delays", she said. "Rather than going to southern England to sit in a queue, just drive to Rosyth," she said.
"The key to the success of this road will be getting whiskey on board," Simpson said, adding that would be another possibility.
"Nice that the Scots see Groningen as the gateway to Europe," Dutch Deputy Prime Minister Kasja Ollongren tweeted in response to the proposed ferry.