After the boat drifts out to sea from Eastbourne into the English Channel, Frank states that the SOS flag Lee has made would not work as it could be weeks before they see another boat.
Ignoring the fact that Frank can't know their exact location, it is highly likely they would still be drifting in the Dover Strait which is actually the world's busiest shipping lane with 500-600 ships a day passing through it.
Ignoring the fact that Frank can't know their exact location, it is highly likely they would still be drifting in the Dover Strait which is actually the world's busiest shipping lane with 500-600 ships a day passing through it.