What should be done if the fuel gauge shows less than 3/4 tank during the after-operation check?

When the fuel gauge shows less than 3/4 tank during the after-operation check, topping off the fuel is essential to ensure that the vehicle operates efficiently without interruptions. Maintaining an adequately filled fuel tank reduces the risk of running out of fuel at inopportune times, which can impact operational readiness and mission effectiveness. In addition, ensuring a full tank helps prevent the introduction of air into the fuel system, which can lead to fuel delivery issues.

Continuing operation with a low fuel level could lead to unexpected disruptions and may compromise the mission or safety. Reporting to maintenance could be necessary for other issues, but it does not address the immediate need to secure fuel. Checking the fuel quality is important for maintaining vehicle performance, but it is not a direct response to a low fuel level unless there are specific concerns about contamination or other fuel-related issues. Therefore, topping off the fuel is the most proactive and practical action in this scenario.