From ancient dugout canoes to modern megaships, maritime vessels have evolved significantly over thousands of years. Early boats included Egyptian reed boats, Khufu's solar boat made of wood and rope, and dhows used in the Red Sea. During medieval times, Viking longships with 60 rowers and massive Chinese junks carrying over 200 people were prominent. The first steamship to cross the Atlantic was the SS Savannah in 1818. Modern developments include the first iron hulled ocean liner SS Great Britain in 1843, the first oil tanker the Zoroaster in 1870, the ill-fated RMS Titanic in 1912, and now huge passenger, war, and cargo ships.