The Limits of Naval Technology Alone

Editor’s Note: Better technology and greater numbers help win wars, but by themselves these factors are not always decisive. Drawing on lessons from World War II, Georgetown University’s John Severini and Columbia University’s Stephen Biddle look at the U.S.-China naval balance and point to the role of organizational and doctrinal factors in shaping victory.

Daniel Byman

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The debate over U.S. and Chinese naval power focuses heavily on material factors such as ship counts, industrial capacity, and shipbuilding rates. Those factors matter enormously, and a growing body of analysis suggests the United States is falling behind on all three. As one of us has recently argued, China’s vastly superior shipbuilding capacity could prove pivotal in a long war with the United States. Yet material balance alone is an incomplete predictor of how naval battles actually unfold.

World War II, the last time the United States engaged in large-scale naval combat, offers many lessons. In August 1942, a materially inferior Japanese squadron destroyed four Allied heavy cruisers in 33 minutes at the Battle of Savo Island, arguably the second worst defeat in U.S. Navy history. Fifteen months later, at the Battle of Cape St. George, the U.S. Navy won a lopsided victory with the same radar technology that had failed it at Savo Island. The difference lay in nonmaterial factors. In recent research, we argue that training, organization, and institutional adaptation can be decisive at sea, with direct implications for how the United States and China will perform against each other in any future conflict.

Two Battles, Two Outcomes

At Savo Island, the Allied squadron had the advantage on paper. Seventeen warships, including six heavy cruisers, guarded the approaches to Guadalcanal against a Japanese force of eight ships. The Allied fleet outweighed its opponent by more than 85 percent in total displacement. Fifteen of the 17 Allied ships carried radar, a technology the Japanese had not yet developed. The Japanese deployed superior torpedoes, but Allied radar and preponderant numbers should have trumped this. None of it mattered. A broken chain of command, exhausted crews, and radar operators who could not exploit their superior equipment produced an Allied rout.

Organizational problems abounded. Rear Adm. Victor Crutchley divided his cruisers into three dispersed groups to guard against a submarine threat that was not actually present and then left the scene before the battle to attend a conference, delegating command without informing most of his captains. When the Japanese opened fire, Allied ships were at reduced readiness. Confusion reigned: The USS Astoria’s gunnery officer ordered return fire as the ship came under attack, but the captain countermanded the order. He could not tell whether the ships firing on him were Japanese or friendly, and he did not trust the radar picture to resolve the question. Earlier in the battle, the destroyer USS Bagley had launched torpedoes into the friendly HMAS Canberra, mistaking it for a Japanese vessel. In just under 40 minutes of fighting, four Allied cruisers were sunk, three other ships were heavily damaged, and more than 1,000 Allied sailors were dead; no Japanese warship was lost.

Fifteen months later, at Cape St. George in November 1943, the material balance was much closer to even. Both sides deployed five ships, and Japan retained its advantage in torpedo technology. Yet the U.S. Navy had used the intervening 15 months to full effect. The U.S. squadron now carried institutional innovations developed in response to Savo Island. Chief among them was the Combat Information Center, a shipboard facility that integrated radar, radio, and sonar data into a single real-time picture of the battlespace and fed synthesized information directly to the ship’s captain. Commander Arleigh Burke paired the new facility with tactics using independently maneuvering destroyer divisions, distributed explicit orders before the battle, and rehearsed them with his subordinates.

The battle that followed was a rout of a different kind, with the U.S. Navy detecting the enemy first, firing first, and coordinating its fires across multiple groups. Japanese lookouts failed to detect the American squadron until U.S. ships were within 5,000 yards. The Japanese lost three of five ships, while the United States lost none. The same radar technology that had been ineffective at Savo Island became a war-winning advantage once crews were trained to interpret it and commanders were willing to trust what it told them.

The U.S.-China Balance

Although the ships, detection technologies, and organizational structures have all evolved, the same question of how to fight effectively remains. China’s naval modernization has produced a growing fleet that already outnumbers the U.S. Navy and whose technology is improving rapidly. Yet, as in 1942, material balance is only part of the picture. How a navy uses its materiel matters centrally, and effective employment cannot be taken for granted.

The argument cuts in more than one direction. The U.S. Navy has more recent combat and operational experience than the People’s Liberation Army Navy, which has not fought a naval engagement since 1988. That experience gap is a real Chinese vulnerability. Yet such a gap is not static. Skills change during a war. Combat experience transformed the U.S. Navy between Savo Island and Cape St. George, and a similar process could, in turn, sharpen Chinese performance during an extended conflict.

The United States also faces a parallel readiness problem in the form of technologies that have never been tested in combat, including autonomous drone wingmen for carrier operations, artificial intelligence-powered target recognition systems for surface combatants, and distributed maritime operations concepts that assume coordinated fires across independently operating groups. Will the results in combat look more like radar at Savo Island or at Cape St. George?

What Should Change

The engagements and their modern analogs hold three implications for the U.S. Navy.

First, while training, doctrine, and organizational integration are easy to undervalue because their returns are harder to quantify than materiel modernization, they are crucial in combat. The Combat Information Center was an institutional innovation, not a technological one. In a constrained resource environment, these nonmaterial factors must be prioritized. The Navy’s experience with radar at Savo Island is not one to repeat today.

Second, net assessments that focus on materiel will miss the factors that mattered most in 1942 and are likely to matter again. Combat experience, training realism, and institutional integration of new systems are difficult to measure, but analyses that ignore them risk grave error. An analyst in 1942 who assumed the U.S. Navy would use its equipment to its full technical potential at Savo Island would have been badly wrong.

Third, skill and institutional advantages are not constants—they change over time. Fifteen months of learning and adaptation by the U.S. Navy produced very different behavior in 1943 than in 1942. The Chinese experience gap today is real but not immutable, and the United States will have to commit to sustained investment to maintain an edge. A static read of the skill balance is as incomplete as a static read of tonnage.