In what scenario might fixed lines be most useful?

Fixed lines are most useful in scenarios characterized by static defenses aiming for predicted targets. In this context, machine gunners can establish predetermined lines of fire that are aligned with the expected approaches of the enemy. This approach allows for efficient coverage of specific areas and helps maximize the effectiveness of the firepower, as the gunners know where and when to aim based on the tactical situation.

Utilizing fixed lines in static defenses also contributes to coordinated fire plans, where multiple gunners can create overlapping fields of fire, enhancing the overall defensibility of a position. This predictability in enemy movement means that the gunners can focus their training and resources on those lines, leading to heightened accuracy and improved lethality when engaging the adversary.

In contrast, dynamic mobile battles require flexibility and adaptability, making fixed lines less practical. Training exercises for novice gunners may involve learning about various firing positions but do not emphasize the specific scenario of fixed lines. Engaging aerial threats typically requires different tactics, often involving high mobility and quick adjustments instead of stationary lines. Thus, the scenario of static defenses with fixed lines aligns perfectly with effective and calculated machine-gun employment strategies.