The Ship Registration Law Article 55

In the event that the obligor is dead when the event mentioned in Item 1 or 3 of the preceding article happens, the obligor shall submit the certificate of death of the obligor to apply for deleting the registration.
中文原文 船舶登記法第55條
遇有前條第一款或第三款情形而登記義務人死亡時,應由登記權利人檢具登記義務人之死亡證明書申請註銷登記。

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