In most missile packs, the missiles are aligned in a simple grid, so you get straight columns and rows out fo the missile holes. On the T-Bolt IIC, the rows are...okay...but the columns are distinctly and dramatically curved.
In Fifth Element, the symbol for air was a series of four vertical wavy lines, parallel to each other. The symbol for water was the exact same wavy lines, turned 90 degrees. The Thunderbolt's missle rack gave me the same impression.