What is an acceptable action if you're on final approach and have lost contact with the tower?

When you are on final approach and have lost contact with the tower, the most prudent action is to make a go-around to reassess the situation. This approach allows the pilot to ensure safety by avoiding potential conflicts with other aircraft and also gives time to evaluate the situation more fully. A go-around can be critical in maintaining situational awareness, especially when communication with air traffic control is compromised.

Continuing to land without any clearance may introduce significant risks, as there could be other aircraft in the vicinity that you are not aware of, and this could lead to dangerous situations. Establishing contact on an alternate frequency is a possible action but might not yield results quickly, especially if you are close to landing. Landing and assuming the controller is busy can also lead to unsafe situations, as it disregards the possible need for instructions or alerts from the tower regarding traffic, landing conditions, or emergencies.

Thus, the go-around option not only prioritizes safety but also provides the opportunity to regain communication and reassess the environment before proceeding with landing.