The Ship Registration Law Article 45

In the case of registering the establishment of a mortgage before which a registration of mortgage has been made, the registered amount of the former mortgage shall be indicated in the application form.
中文原文 船舶登記法第45條
因抵押權之設定而申請登記者,如已有抵押權之登記在前時,申請書內應記明其已登記之抵押權。

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