From PSU: “First up, lets take a look at one of the other excellent options. Open your map by pressing the d-pad once youve chosen your character. Before you deploy with your team, youll see the full map.
You see that supply ship, moving around the map? Time it perfectly and you can aim to land on top of it to get some high tier loot. The bad news is that others will be doing exactly the same, so competition can be fierce on the loot ship.”
Source: N4G PC Apex Legends Best Loot Location – Where To Find Top Gear And Weapons