Final answer:
The three types of fire that characterize a Final Protective Line (FPL) are grazing fire, interlocking fire, and frontal fire.
Step-by-step explanation:
The three types of fire that characterize a Final Protective Line (FPL) are grazing fire, interlocking fire, and frontal fire.
- Grazing fire: This type of fire occurs when the enemy is in a long, narrow formation and the FPL is perpendicular to their line of advance. The fire is directed across the enemy formation, causing casualties from side to side.
- Interlocking fire: Interlocking fire occurs when two or more FPLs converge on a common target area. This type of fire covers the target area from multiple directions, ensuring maximum coverage and effectiveness.
- Frontal fire: Frontal fire is used when the enemy is directly in front of the FPL. The fire is directed straight at the enemy, targeting their front ranks and causing casualties in a linear manner.