There is a horizontal photo of Titanic at home, and I really want to hang it in the living room, but I am worried that the implication of its sinking is not good in geomantic omen. What should I do?

I don't think it matters. Many northerners hang landscape paintings at home.

It is said that it is unlucky in the south. Just a personal opinion.

Titanic looks good on the wall, and it is atmospheric enough. Its moral is that Titan means never sinking. Very lucky!