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Now you know why the Titanic sank.

This photograph came from a Rig manager for Global Marine Drilling in St. John, Newfoundland.

They actually have to divert the path of these things away from the rig by towing them with ships.

In this particular case the water was calm and the sun was almost directly overhead so that the diver was able to get into the water and click this picture.

They estimated the weight at 300,000,000 tons

Origins:   Charming story, but this picture is actually an image called "The Essence of Imagination," marketed by Successories, the "premiere source for motivational media."

This image was produced in 1999 by Ralph A. Clevenger, a professional nature and underwater photographer who is also a member of the faculty of the Brooks Institute of Photography in Santa Barbara, California. As Mr. Clevenger explained, this image is not a single photograph but a composite of four different photographs (not all taken in the same place):
The iceberg image is a digital composite that I designed to illustrate the concept of "what you see is not necessarily what you get". As an underwater photographer I knew that my "vision" of what a big iceberg looks like was impossible to get in reality so I had to create it. The image exists in nature but due to water visibility is not possible to capture on film.

There are 4 separate images involved; the sky, the background, the top iceberg (shot in Antarctica), and the underwater iceberg (shot above water in Alaska and flipped in the final composite).

Sorry hager, you got fooled. Its a fake picture

They actually have to divert the path of these things away from the rig by towing them with ships

Tjose would also need to be mighty big ships come to think of it...

Charlie

How much of an iceberg is below water?

The "tip of the iceberg" expression can be explained as follows: Icebergs float because the density of ice (around 900 kg per cubic meter) is lower than that of seawater (around 1025 kg per cubic meter). The ratio of these densities tells us that 7/8 of the iceberg's mass must be below water. Usually icebergs are 20% to 30% longer under the water than above and not quite as deep as they are long at the waterline.