Which tactic should NOT be used when executing ventilation during firefighting operations?

When executing ventilation during firefighting operations, it is crucial to maintain coordinated tactics to ensure safety and effectiveness. Ventilating ahead of an advancing hose line is inappropriate because it can allow smoke and heat to move unpredictably, potentially endangering firefighters and allowing the fire to spread. Effective ventilation is typically synchronized with the advancement of attack lines to manage the fire conditions and improve visibility while protecting the crew actively fighting the fire.

The other tactics highlighted in the options are essential practices. Coordinating ventilation with the attack line advances helps to create a safer and more effective firefighting environment. Ventilating when directed by the incident commander ensures that the tactical decisions are based on the overall incident strategy. Ventilating at the highest point of the building is also a common practice, as it allows the heat and smoke to escape more efficiently. These practices all contribute to the overall safety and effectiveness in firefighting operations.