YOU SAID:

the lighthouse is helpful to the ships at sea when they cannot see the shore

INTO JAPANESE

灯台は、海岸が見えないときに海上の船に役立ちます

BACK INTO ENGLISH

Lighthouse helps ships at sea when the coast is out of sight

INTO JAPANESE

灯台は、海岸が見えないときに海上で船を助けます

BACK INTO ENGLISH

Lighthouse helps ships at sea when the coast is out of sight