Final answer:
The incorrect statement is that advancing a charged hose line up a ladder is the safest and best manner. The correct method is to climb the ladder with an uncharged hose line for safety and ease of climbing, then charge the hose once in position.
Step-by-step explanation:
The question concerns the protocols for advancing a hose line up a ladder during firefighting operations. The incorrect statement among the options provided is A. "The safest and best manner is to advance a charged hose line up the ladder." This statement is incorrect because advancing a charged hose up a ladder is more dangerous due to the weight and pressure of the water, which can make the ladder unstable and more difficult for firefighters to climb, especially if they need their hands free to maintain balance or perform rescues.
The correct approach is to advance an uncharged hose line up the ladder first. Once the nozzle person has climbed the ladder and is in position, the hose can then be charged. This method is safer because an uncharged hose is lighter and easier to manage when climbing the ladder. Two firefighters should coordinate their movements to maintain safety and efficiency. The nozzle person should have both hands free for climbing and should stop at a point on the ladder, about 20 feet up, to position themselves before the hose is charged.