(Image credit: Embark) The Riven Tides update adds a new beach resort map to Arc Raiders , so why not kick back and play in the sand? That's what the Beachcombing map condition is all about, letting you search for buried treasure on the shore. However, you'll need the Dockmaster's Detector first. Beachcombing is unlike any other map condition currently in the game, in that you actually need to bring a specific item into the match to really get the most out of it. That's the Dockmaster's metal detector, and you'll need to equip it like a gadget. How to get the Dockmaster's Detector in Arc Raiders (Image credit: Embark) Before you can start scanning for treasure, you need to obtain a Dockmaster's Detector. This is a new gadget that's effectively a metal detector.…