Don't worry too much about math subjects kai usually daugon rana sa attendance nimo. Basta tan.aw lang sa imo teacher nga naningkamot ka and dili ka tig absent. As what most seafarers say, lisod ang pag skwela pero sayon ra ig sakay na nimo coz your experience will teach you how to do your job better. Samot na karon na high tech na ang mga instruments sa barko. Of course, you have to be vigilant when you are on duty coz a single mistake may cost the lives of your coleagues. In short, dili mag danghag.
Just be aware though nga lisod ang apprenticeship na stage coz you have to be physically tough para makaya nimo ang trabaho. But of course, after your one year apprenticeship, i think pwede naka take ug exam for deck officers.
Grabeh ang sweldo sa seaman especially if Master na imo rank or Chief Engineer. My wife's uncle is a ship captain and he is getting not less than 8000USD a month on a 3-3 contract. Which means 3 mos siya onboard, bakasyon daun ug 3 mos WITH PAY then sakay na pud balik for 3 mos.