What must even numbers correspond to on the TR-310?

Even numbers on the TR-310 correspond to East/West. The TR-310 is a specific tool or methodology used in various contexts, such as navigation or mapping, where directional alignment is essential. In this case, even numbers are specifically designated for the East/West axis, implying that any even-numbered identification or marking will indicate a point or position that is oriented along that horizontal plane.

In navigational systems, this classification helps users quickly identify directional coordinates, leading to more efficient and accurate positioning. The association of even numbers with East/West allows individuals trained in the system to effectively communicate, plan, or execute operations in relation to geographical locations or coordinates.