舰艇在夜晚巡航，确保海域安全。

Jiàntǐng zài yèwǎn xúnháng, quèbǎo hǎiyù ānquán.

The warships patrol at night to ensure the safety of the sea area.

这支舰艇编队参与了国际合作演习。

Zhè zhī jiàntǐng biānduì cānyùle guójì hézuò yǎnxí.

This fleet of warships participated in international cooperation exercises.

舰艇的任务包括海上巡逻和救援行动。

Jiàntǐng de rènwu bāokuò hǎishàng xúnluó hé jiùyuán xíngdòng.

The tasks of warships include maritime patrols and rescue operations.