This Day in Diving History -- December 7, 1941 -- "A Date Which Will Live in Infamy" **
At 0755 Hawaii time, a Japanese dive bomber bearing the red symbol of the Rising Sun of Japan on its wings appears out of the clouds above the island of Oahu. A swarm of 360 Japanese warplanes followed, descending on the U.S. naval base at Pearl Harbor in a ferocious assault. The surprise attack struck a critical blow against the U.S. Pacific fleet and drew the United States irrevocably into World War II.
With diplomatic negotiations with Japan breaking down, President Franklin D. Roosevelt and his advisers knew that an imminent Japanese attack was probable, but nothing had been done to increase security at the naval base at Pearl Harbor, HI. It was Sunday morning, and many military personnel had been given passes to attend religious services off base. At 0702, two radar operators spotted large groups of aircraft in flight toward the island from the north; but, with a flight of B-17s expected from the United States at the time, they were told to sound no alarm. This caused, the Japanese air assault to come as a devastating surprise to the naval base.
Much of the Pacific fleet was rendered useless: 5 of 8 battleships, 3 destroyers, and 7 other ships were sunk or severely damaged, and more than 200 aircraft were destroyed. A total of 2,400 Americans were killed and 1,200 were wounded, many while valiantly attempting to repulse the attack. Japan's losses were some 30 planes, 5 midget submarines, and fewer than 100 men. Fortunately for the United States, all three Pacific fleet carriers were out at sea on training maneuvers. These giant aircraft carriers would have their revenge against Japan 6 months later at the Battle of Midway, reversing the tide against the previously invincible Imperial Japanese Navy in a spectacular victory.
The day after Pearl Harbor was bombed, President Roosevelt appeared before a joint session of Congress and declared, "Yesterday, December 7, 1941 - a date which will live in infamy - the United States of America was suddenly and deliberately attacked by naval and air forces of the Empire of Japan." After a brief and forceful speech, he asked Congress to approve a resolution recognizing the state of war between the United States and Japan. The Senate voted for war against Japan by 82 to 0, and the House of Representatives approved the resolution by a vote of 388 to 1. The sole dissenter was Representative Jeannette Rankin of Montana, a devout pacifist who had also cast a dissenting vote against the U.S. entrance into World War I. Three days later, Germany and Italy declared war against the United States -- something they did not have to do under the terms of their treaty with Japan, since Japan attacked the U.S. and not the other way around. This proved to be a disastrous blunder on the part of Hitler and Mussolini, and the U.S. government responded in kind.
It was on one of America's darkest days that Navy Divers would rise to one of its very finest hours. Within a week of the attack, a salvage organization was formally established to begin what would clearly be a monumental undertaking. Commanded from early January 1942 by Captain Homer N. Wallin, this Salvage Division labored hard and productively for over two years to refloat five ships and remove weapons and equipment from the other two. Among its accomplishments were the refloating of the battleships USS NEVADA (BB-36) in February 1942, USS CALIFORNIA (BB-44) in March, USS WEST VIRGINIA (BB-48) and the minelayer USS OGLALA (CM-4) during April-July 1942. After extensive shipyard repairs, these four ships were placed back in the active fleet in time to help defeat Japan. Navy Salvors also righted and refloated the capsized battleship USS OKLAHOMA (BB-37), partially righted the capsized target ship UTAH (BB-31) and recovered material from the wreck of the battleship ARIZONA (BB-39). However, these three ships were not returned to service, and the hulls of the last two are the only two remain in Pearl Harbor to this day. Were it not for these efforts -- the return of warships to the fight or the ability to have Pearl Harbor serve as a functional fore-deployed base; the war effort in the Pacific Fleet would have certainly had a different outcome.
All this represented one of history's greatest salvage jobs. Seeing it to completion encompassed some 20,000 hours of bottom time in about 5000 dives. Long and exhausting efforts were expended in recovering human remains, documents, ammunition and other items from the oil-fouled interiors of ships that had been under water for months. Uncounted hours went into cleaning the ships and otherwise getting them ready for shipyard repair. Much of this work had to be carried out in gas masks, to guard against the ever-present risk of toxic gasses, and nearly all of it was extremely hazardous.
Note: To read more about salvage efforts following the Pearl Harbor attack; check out "Descent into Darkness Pearl Harbor, 1941" by Edward C Raymer.