Seafarer's Service Regulations Article 31

In the case of an accident that leaves the master unable to perform his/her duties, the master shall immediately notify the employer of the need for a deputy to take over the vessel. Prior to said deputy’s arrival, the vessel and the voyage shall be the responsibility of the seaman with the highest rank in the deck department.
中文原文 船員服務規則第31條
船長遇有特殊事故不能執行職務時,應即報請雇用人派員代理,船舶在航行中,應由艙面部門之海員中職位最高之一人代理其職務。

English translation for reference only; the Chinese text prevails. Not legal advice.