The ferry can only carry a limited number of cars per hours.
Around since 1905, the ferry carries 19 million across the harbor each year.
The six other ferries carried from 68 to 120 cars and up to 1,200 passengers.
The ferry carries nearly 1,000 commuters each day, down from more than 2,000 early last year.
Although the ferry originally carried a toll, today, it is free.
The authorities said the ferry carried 34 passengers and 18 crew members.
Prior to the opening of the old bridge in the 1930s a ferry across the river carried goods north and south.
The ferry can carry about 130 passengers and there is space for 60 bicycles.
The ferry can carry approximately 80 vehicles and 700 passengers.
The ferry is certified for 50 passengers and can carry small vehicles.