Is there any danger in the ocean? How dangerous is it?

There are three dangers in the ocean. 1. Weather, when encountering a big storm, you can only ask for more happiness. 2 marine environment, beware of reefs, icebergs, and rare sightings. If you see them, you will die of marine vortex and plant sea. 3. Pirates, terrorist attacks and other man-made disasters

Aside from the above, as long as there is nothing wrong with the quality of your ship and the crew are not fools, it is very safe.