Bottom-up processing is not thought to be a very efficient way to approach a text initially, and is often contrasted with top-down processing, which is thought to be more efficient. Example. Asking learners to read aloud may encourage bottom-up processing because they focus on word forms, not meaning.
Had Titanic hit the iceberg head on, it is likely that there would be massive crushing of the fore part of the ship, which may have prolonged its end, since theoretically while it may have begun to go down by the bow, the center and aft compartments would have stayed dry for a longer period of time.
The Titanic hit the iceberg on it's starboard side, this cause the iceberg to buckle the steel plates of Titanic's hull across several of the watertight compartments. It's theorized that had Titanic hit the iceberg head on, less watertight bulkheads would have been breached and the Titanic would not have sunk.