Poole chain ferry at night,

Bramble Bush Bay ferry is 242 feet overall and has a beam of about 53 feet 6. 
As you might expect, over the 70 years or so since the company began operations the car-carrying capacity of the ferry in service has increased by 220%, rising from 15 in 1926 to the 48 of today.
Annually the ferry carried something in the order of 650,000 vehicles