How often must combos on key locks be changed?

Changing the combinations on key locks is a critical element of maintaining security within military operations and facilities. The correct answer indicates that combinations must be changed every six months. This semi-annual change ensures that security measures remain robust and reduces the risk of unauthorized access. Regularly updating combinations is part of prudent security practices, helping to safeguard sensitive materials and locations.

This timeframe is designed to create a balance between operational security and the logistical feasibility of changing combinations. By doing so, it minimizes the likelihood that individuals can discover or remember the combination over time, which could potentially lead to security breaches. Hence, the six-month interval is outlined in regulations to maintain a high standard of security within Navy operations.