pilot flag

(nautical) The flag hoisted at the fore by a vessel needing a pilot.

Japanese Meaning

船舶がパイロットを必要とする際に、船首で掲げる旗

The captain instructed the crew to hoist the pilot flag at the bow as the ship approached the harbor.

船長は入港に際して船首に水先人を求める合図の旗を揚げるよう乗組員に指示した。

Sense（1）

(nautical) The flag hoisted at the fore by a vessel needing a pilot.

pilot flags

（ plural ）