Final answer:
The second position of the ERRC designator indicates the equipment type, which is used in military logistics to classify equipment for maintenance policies.
Step-by-step explanation:
In the context of the ERRC designator, the second position signifies the equipment type. The ERRC (Equipment Repair/Replacement Capability) code is a system used by the military, particularly in logistics and supply chains, to identify the characteristics of equipment and the associated maintenance policies. The first position indicates the recoverability code, determining if an item is repairable, while the second position, the one in question, specifies the type of equipment based on a predefined categorization.