A Tip Of The Iceberg
The phrase “a tip of the iceberg” is believed to have been first officially recorded in 1969, which was approximately 57 years after the sinking of the famous ship Titanic. While the expression might not have been tied to the ship at first usage, it does imply that there is something much bigger underneath the structure in view.
This picture perfectly captures the statement. While icebergs would typically refer to chunks of ice larger than sixteen feet, some of those icebergs could be bigger than a small country. What’s more, is that only about ten percent of them are visible above the water surface with about ninety percent deep inside.