Senan Molony has suggested that attempts to extinguish the fire – by shoveling burning coals into the engine furnaces – may have been the primary reason for the "Titanic" steaming at full speed prior to the collision, despite ice warnings. Most experts disagree. Samuel Halpern has concluded that "the bunker fire would not have weakened the watertight bulkhead sufficiently to cause it to collapse." Also, it has been suggested that the coal bunker fire actually helped "Titanic" to last longer during the sinking and prevented the ship from rolling over to starboard after the impact, due to the subtle port list created by the moving of coal inside the ship prior to the encounter with the iceberg. Some of these foremost "Titanic" experts have published a detailed rebuttal of Molony's claims.