Where does the contract say whether we can use a ferry ?

When I feel unsure, I usually pay attention to the driving range, even if sometimes I exceed it, I will come back on the same day. I never drive to islands or take ferries. The terms are different, so you need to ask the rental company. Once, the car model I rented was not available, and they upgraded it to an SUV for free. Later, I found that the agreement had a restriction that the daily driving mileage of this car could not exceed 300 kilometers, and each kilometer over would be charged an additional dollar. After returning from the trip in eight days, I drove over 1000 kilometers, and when I returned the car, I explained to the counter staff that the agreement did not match my rental order, and I was able to avoid the additional charge for over-driving.