When Jonah told the sailors to throw him into the sea, what did they try first?

Answer: Rowing hard back to land

The men rowed hard to get back to dry land, but they could not, for the sea was raging against them more and more.

““Pick me up,” he answered, “and cast me into the sea, so it may quiet down for you. For I know that I am to blame for this violent storm that has come upon you.” Nevertheless, the men rowed hard to get back to dry land, but they could not, for the sea was raging against them more and more.”— Jonah 1:12-13 (BSB)