The flood waters rose 15 cubits above the mountains.
After taking soundings, they found the depth to be twenty fathoms. A little later, they took soundings again and found it was fifteen fathoms.
As the man went out toward the east, he carried a measuring line in his hand. He measured out 1,000 cubits as he led me through water that was ankle-deep.
Then he measured out another 1,000 cubits, where he led me through water that was knee-deep. And then he measured out another 1,000 cubits, where the water was waist-deep.
When he had measured out another 1,000 cubits, the water had become deep enough that I wasn't able to ford it. Instead, I would have had to swim through it.