What composition is the cratering charge primarily made from?

The cratering charge is primarily made from Composition H6 and Composition AS because these materials are specifically designed for achieving significant explosive effects needed in cratering applications. Composition H6 is a type of high explosive that offers a high degree of reliability and effectiveness in creating large craters when detonated, making it suitable for military engineering tasks such as battlefield preparation or demolitions. Composition AS, or similar explosives, enhance the performance of H6 in terms of detonation velocity and brisance, which are crucial for creating the desired crater size and depth efficiently.

Other options contain different compositions that do not serve the primary purpose of cratering. Each of those alternatives consists of materials intended for other applications in explosives technology, such as demolition or general blasting, but they lack the specific attributes that make the combination of H6 and AS optimal for cratering charges.