On 14 April at 11:40 PM, "Titanic" struck an iceberg on the ship's starboard side. Andrews was in his cabin, planning changes he wanted to make to the ship, and barely noticed the collision. Captain Edward J. Smith had Andrews summoned to help examine the damage. Andrews and Captain Smith discussed the damage to the ship shortly after the collision and toured the damaged section of the ship, receiving several reports of the vessel's damage. Andrews determined that the first six of the ship's 16 watertight compartments were rapidly flooding, which is more than the four that the vessel was supposed to withstand. He relayed this information to Captain Smith, stating that it was a 'mathematical certainty' that ship will sink and adding that in his opinion, the vessel had only about an hour before foundering. He also informed Smith of the severe shortage of lifeboats on board the ship.