Video report by ITV News' Sue Saville.
Turkey's coastguard stopped nearly 200 migrants trying to reach Greece today, according to Reuters news agency.
A group of 118 Eritreans, Syrians, Iranian and Lebanese people were stopped as they headed to the Greek island of Chios from Cesme in Turkey in two dinghies.
Another group of 63 were stopped as they attempted to travel to Greece's Lesbos from the Turkish coastal town of Dikili.
The news underlines the challenge security forces face in convincing migrants contemplating the voyage that they will not be allowed to enter the EU.
A controversial EU deal to return refugees and migrants who landed on the Greek islands in the last two weeks to Turkey is due to take force on Monday.