"Practical Oceanography" - This one is a real mixed bag as you will be playing some Vertigo in Short COmpetitive, while heading to Ravine for your Guardian mission with kills form the enemies guns, and also to Ancient to get kills in a number of different locations.
Operation Riptide Week 13 Challenges:
[Abyssal Pain] Deathmatch - Ancient (1 Star)
[Destructive Interference] Danger Zone - Sirocco (3 Stars)
Competitive - Short Match - Vertigo (3 Stars)
[Continental Margin] Guardian (2 Stars)
Good luck in your Operation Riptide challenges this week!