According to the Marine Executive, the boat “corresponds to a UK-registered 18-meter sailing vessel named Barcarole.”The vessel left port on Sunday on what is thought to be an estimated 2,000-kilometer trip.

Organizers say climate campaigner Greta Thunberg and other activists set sail Sunday for Gaza on a ship aimed at "breaking Israel's siege" of the territory.

Climate activist Greta Thunberg and actor Liam Cunningham have joined an international group of human rights activists on a dangerous journey. The mission aims to peacefully break the Israeli blockade of the Gaza Strip while drawing attention to the region's dire humanitarian crisis.