What is a precaution to take when testing a line throwing gun?

When testing a line throwing gun, it is crucial to never remove the line from the rocket, as maintaining the integrity of the system is vital for safe operation. The line is designed to be part of a complete unit that functions correctly when fired. Removing the line can lead to a malfunction or failure of the system, which could endanger the operator and others nearby.

Additionally, the line is intricately connected to the rocket mechanism, which ensures that when deployed, the line will properly extend to assist in rescue or towing operations. Any alteration to this setup could result in unpredictable behavior of the device during testing or an actual emergency situation. Therefore, keeping the line attached to the rocket ensures that the testing procedure remains safe and effective.

While ensuring the gun is clean, aiming at a safe distance, and checking for rust on the barrel are all important considerations for the overall safety and functionality of the equipment, they do not directly address the specific and critical concern of tampering with the line and its connection to the rocket during tests.