Indonesian Semi-Submersible

Could it be the first semi-submersible of a Muslim nation? The Ottomans had actual submarines in the 1870s, but no halfway craft that I’m aware of in their or subsequent Turkish history before this point
 
Thank you for the link: A rich seam of wonder and face-palms...
 
Could it be the first semi-submersible of a Muslim nation? The Ottomans had actual submarines in the 1870s, but no halfway craft that I’m aware of in their or subsequent Turkish history before this point
It was built by a German an prooved to be fully submersible (involuntarily....), so I would say no
 
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