Carlbruno,
don't take this as trivial carping; it's important whichever career you decide to follow. I assume you are a native English speaker? If not, I apologise - but this is still important.
In either aviation or the marine industry, you will be expected to be able to express yourself clearly, accurately and concisely. When you are asking advice of people already in the field, show them the respect they deserve and make your question easy to read and understand. Your somewhat rambling post is barely worthy of a child in 3rd grade. I'm sure you can do better...