"Cases as prescribed by Presidential Decree" in the proviso of Article 741(1) of the Act means those cases where a State-owned or public ship falls under any of the following categories:
1. A warship or a police ship;
2. A ship for the inspection of fisheries or for the surveillance of smuggling;
3. Any other ship not used for profit-making but for actual public use, such as a ship for emergency or for human rescue.