Under what condition can common hand tools, like screwdrivers, be substituted without using the SPMIG?

The correct answer is based on the principle of ensuring effectiveness and safety in tool use. When common hand tools, such as screwdrivers, are being considered for substitution, it is essential that they meet the basic requirements for form, fit, and function. This means that the substitute tool should physically fit the task at hand, perform the required function adequately, and is compatible with the existing tools or components being used.

Substituting tools that fit these criteria ensures that they can perform the same tasks without compromising safety or efficiency. This understanding is especially important in environments such as the Navy, where adherence to standards affects operational readiness and safety.

Other choices, while they might have their own reasoning, do not align with the critical requirements for effective tool substitution. For example, the brand of the tool does not guarantee its performance or suitability for the task, nor does being color-coded or having a warranty ensure that the tool meets the operational needs. Thus, the focus on form, fit, and function encapsulates the necessary condition for replacing a tool.