Key deets
⚡Climb onto one of the drones the frigate spits out and interact to disrupt it.
⚡Ride it up to the Arc Frigate.
⚡Damage a Rocketeer, Vaporizer, and Hydra turret to complete the quest.
Arc Raiders‘ new Boarding the Frigate quest is about finding a way up onto the giant flying Arc fortress during the new Arc Frigate map modifier. Since this is a colossal arc event, you’ll want to bring plenty of ammo and healing. A Grappling or Snap Hook will come in handy, too.
You can get onto the frigate (as shown in the video) by finding one of the circular Arc drones that it spits out when it arrives on the map, climbing or grappling on top of it, and then interacting with it to disrupt the drone. This will cause it to fly back to the frigate, allowing you to climb aboard.
The ship is absolutely massive, and as you make your way through it with other raiders, it’ll spit out Rocketeers, Vaporizers, and Hydra turrets will pop out on the top level as well. To finish off the quest, you’ll have to damage all three, though you don’t have to get the killing blow on any of them. Rocketeers and Vaporizers (if you somehow haven’t encountered them before) are big flying arcs that fire rockets and lasers, respectively, while the Hydra is a multigun turret that’s pretty deadly.
Presumably, you can also damage these enemies elsewhere to complete this step, though I haven’t encountered a Hydra anywhere else except on top of the frigate so far, so that’s likely your best bet. If you’re struggling to navigate the ship, you can open new platforms with switches and by shooting the yellow nodes sticking out, though a Grappling Hook will also help skip some stages.