NET
19 Then, when they had rowed about three or four miles, they caught sight of Jesus walking on the lake, approaching the boat, and they were frightened.
Darby
19 Having rowed then about twenty-five or thirty stadia, they see Jesus walking on the sea and coming near the ship; and they were frightened.
KJV
19 So when they had rowed about five and twenty or thirty furlongs, they see Jesus walking on the sea, and drawing nigh unto the ship: and they were afraid.