FDC General Knowledge For Fire Control Specialist (13J) Practice Test

RALS stands for?

Left Add, Right Subtract Left Subtract, Right Add Right Add, Left Subtract Right Subtract, Left Add

Correct Answer:

Right Add, Left Subtract

Explanation:

This question tests the sign convention used for aiming adjustments in firing data. RALS stands for Right Add, Left Subtract. That means when you adjust the sight or reticle to move the impact to the right, you “add” a correction to the right; when you move the sight to the left, you “subtract” a correction to the left. This provides a consistent rule for applying windage or lateral corrections. The pairing Right Add and Left Subtract is the correct one because it aligns with how adjustments are recorded and interpreted on sights and ballistic data. The other pairings would flip the signs and would lead to applying corrections in the opposite direction.

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