noun
fire support coordination line
Military term for a line established to coordinate fire support between units, often used in joint operations.
火力支援調整線は、友軍の誤射を防ぐために設定される。
The fire support coordination line is established to prevent friendly fire.
Compound of 火力 (firepower), 支援 (support), 調整 (coordination), and 線 (line).