Ano nag naimbentong kagamitan na nkatulong sa paglalayag ng mga kanluranin upang makapaglayag?

Oh, dude, like the Westerners invented the compass, right? So, they could navigate the high seas and not get lost like a bunch of clueless sailors. It's basically a fancy magnet that points north, so they could sail around without playing a real-life version of "Where's Waldo" with their ships.