Which Air Force information management tool is used to record vapor readings during tank cleaning?

The correct choice is the 172 form, which is specifically used in the context of fuel and water systems maintenance to record vapor readings during tank cleaning operations. This form is vital for ensuring safety and compliance, as monitoring vapor levels is crucial to prevent flammable or hazardous conditions during maintenance activities.

The 172 form functions as a record-keeping tool that captures important data, which can later be analyzed to assess the conditions within the tank before cleaning begins. This ensures that technicians have a clear understanding of the environment they are working in, which is essential for both operational safety and environmental protection.

Other options do serve different purposes within the scope of Air Force operations but do not pertain specifically to the task of recording vapor readings during tank cleaning, making them unsuitable for this particular function.