(b) A power-driven vessel underway but stopped and making no way through the water shall sound at intervals of not more than 2 minutes two prolonged blasts in succession with an interval of about 2 seconds between them.

(b) 航行中但已停止且无法通过水域的机动船舶，应以不超过 2 分钟的间隔连续鸣响两次长鸣声，两次鸣响之间的间隔约为 2 秒。