What were the first aircraft of the navy called?

The first aircraft of the United States Navy were indeed called the A-1 Triad. This designation reflects the early era of naval aviation, specifically in the 1910s when the U.S. Navy began experimenting with aircraft for maritime operations. The A-1 Triad was notable for being the Navy's first operational aircraft, marking a significant milestone in the development of naval aviation capabilities. Its introduction symbolized the beginning of a new branch of military service that integrated air power into naval operations, ultimately contributing to the evolution of modern naval warfare.

In contrast, the other options represent aircraft from much later periods in aviation history. The B-2 Spirit is a stealth bomber introduced in the late 20th century, the C-130 Hercules is a versatile transport aircraft that has been in service since the 1950s, and the D-4 Phantom II is a fighter jet that gained fame in the 1960s and 1970s. These aircraft do not reflect the early beginnings of naval aviation like the A-1 Triad does.