The change from coal to oil-fired boilers at sea is another chapter in petroleum history.

Commissioned on March 12, 1914, with coal-powered boilers that were converted to use fuel oil in 1925, the U.S.S. Texas “was the most powerful weapon in the world, the most complex product of an industrial nation just beginning to become a force in global events,” says an historian at Battleship Texas State Historic Site.

The U.S.S. Texas, commissioned in 1914, was the last American battleship built with coal-fired boilers. It converted to burn fuel oil in 1925 – resulting in a dramatic improvement in efficiency.

When the industrial revolution ended the “age of sail,” coal that fired the boilers of steam-powered ships became a strategic resource. Worldwide “coaling stations” were essential at a time when oil was little more than a crude lubricant or patent medicine.

In 1866, Congress appropriated $5,000 to evaluate petroleum as a potential replacement for coal to fire the Navy’s boilers. The “experts” decided to stay with coal.

“The conclusion arrived at was that convenience, health, comfort and safety were against the use of petroleum in steam-vessels,” reported Admiral George Henry Preble.

“The only advantage shown was a not very important reduction in the bulk and weight of fuel carried,” he added.

However, the Spanish-American War of 1898 changed the Navy’s mind about using coal for fuel. For the first time, coal-fired U.S. war vessels had to fight far from continental shores.

Despite American victories in Manila Bay in the Philippines and Santiago de Cuba, hard strategic lessons were learned about fueling coal-powered battleships.

A coal-powered battleship burned up to 10 tons of coal every hour – producing dense smoke tons of ash.

Coal-fired boilers not only produced dense smoke, they created tons of ash. Sailors (with ratings of coal heaver and later, coal passer) labored with shovels to feed massive boilers.

Range limitations and resupply needs made coaling stations critical. When the Spanish fleet successfully ran the American blockade of Santiago, four American ships were absent…re-coaling 45 miles away.

“Coaling ship” was a major undertaking. “Our ship held about 2,000 tons of the stuff,” recalled a coal passer from the battleship U.S.S. Connecticut in 1907.

“All the deckhands would go down into the collier and fill these big bags with about 500 pounds,” the sailor added. “Then they’d hoist ‘em over to us down in the coal bunkers and we’d spread out the coal with shovels until all the bunkers – about 20 – were full to the top.”

Coal Power gives way to Oil Power

With lessons learned from the Spanish-American War experience, fuel oil began to replace coal in U.S. warships.

Petroleum supplies became more abundant within America’s borders in the early 1900s as Texas’ giant Spindletop oil field and other major discoveries emerged. Spindletop, which launched the modern petroleum age, is located in Beaumont – only 60 miles from  the U.S.S. Texas.

Importantly, oil produced far more energy per pound than coal and vastly simplified the logistics of resupply. The use of oil-fired boilers changed battleship design dramatically and contributed to the development of massive new battleships.

Prior to the conversion to oil, the ship’s first job when reaching port was taking on coal.

On July 2, 1910, as the Navy converted from coal to oil-burning ships, President William Howard Taft established three Naval Petroleum Reserves.

Concerns about an assured oil supply in the event of war or a national emergency had resulted in the Pickett Act of 1910, which authorized the president to withdraw large areas of potential oil-bearing lands in California and Wyoming as sources of fuel for the Navy.

Within 15 years, the properties that made up the Naval Petroleum and Oil Shale Reserves included three petroleum reserves and three oil shale Reserves. A Naval Petroleum Reserve Number Four, on the north slope of Alaska, was added in 1923.

As not only the largest owner of oil lands, but as a prospective large consumer of oil by reason of the increasing use of fuel oil by the Navy, the federal government is directly concerned both in encouraging rational development and at the same time insuring the longest possible life to the oil supply. – December 6, 1910, message to Congress by President Taft

Sailors shoveled 2,891 tons of coal from coal barges to fill the Texas’ coal bunkers.

By 1916, the Navy had commissioned its first two capital ships with oil-fired boilers, the U.S.S. Nevada and the U.S.S. Oklahoma. To resupply them, “oilers” were designed to transfer fuel while at anchor, although underway replenishment was possible in fair seas.

During World War I, a single oiler refueled 34 destroyers in the mid-Atlantic – introducing a new era in maritime logistics. The sailors’ rating of “coal passer” passed into history by 1917.

“When the U.S.S. Texas was commissioned on March 12,1914, she was the most powerful weapon in the world, the most complex product of an industrial nation just beginning to become a force in global events,” notes one historian. The Texas converted from coal to oil-fired boilers in 1925. Visit the Battleship Texas State Historic Site.

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