As middleofnowhere says. If both riders end up on the same ferry, they need to establish who arrived at the port first. It'll be done either on the tracker, or via some sort of documentary evidence, for example an ATM receipt.
@Alex_B started
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As middleofnowhere says. If both riders end up on the same ferry, they need to establish who arrived at the port first. It'll be done either on the tracker, or via some sort of documentary evidence, for example an ATM receipt.