What action is appropriate if an electronic glide slope malfunction occurs while making an ILS approach with VASI in sight?

When an electronic glide slope malfunction occurs during an ILS approach, the pilot may continue the approach while utilizing the visible VASI (Visual Approach Slope Indicator) glide slope. The VASI provides visual guidance to ensure the aircraft is on the correct approach path, typically set at a 3-degree glide slope.

This option is appropriate because the VASI system is independent of the ILS electronic components and provides a reliable reference for pilots. By maintaining a proper visual approach using VASI, pilots can safely land without relying solely on the malfunctioning electronic glide slope. Continuing the approach in this manner allows for a safe landing while still adhering to standard operating procedures.

In contrast, other options suggest more conservative actions that may not be necessary, assuming the visual approach guidance provided by the VASI is clear and usable.