In moat cases, only the propellor at the rear of the ferry is running. To run both propellors creates a lot of turbulence with water being pushed against the hull.
Both the ferry boat and the rifle bullet have large amounts of momentum because momentum is determined by the mass and velocity of an object. Even though the ferry boat is moving slowly but has a large mass, while the rifle bullet is moving quickly but has a much smaller mass, their momentum values end up being significant due to the combination of these two factors.
Lone Tree Ferry ended in 1872.
Fontaine Ferry Park ended in 1969.
Ferry Street School ended in 1938.
Air Ferry Limited ended in 1968.
Toronto Ferry Company ended in 1927.
Ferry railway station ended in 1959.
Yaumatei Ferry Pier ended in 1933.
Briton Ferry Athletic F.C. ended in 2009.
Stoke Ferry railway station ended in 1930.
Chai Wan Ferry Pier ended in 1986.
Ballachulish Ferry railway station ended in 1966.