From the wording of the orders you recovered, it looks like the first priority of the Defias will be to locate and secure whatever cargo they possessed.
If we're to beat the Defias to this cargo, we'll need his help. Look for him in the waters northeast of a small island just north of the island you visited earlier.
Well met, <class>. What brings you out here?
<Renn looks over the orders.>
So there was valuable cargo on board! We have to locate it before the Defias recover it. These guys are no divers, but we're going to need some of their gear if you're to help me find the cargo.
- 370 XP
To get to Renn: Run northeast from Sentry Point until you reach the beach. Follow the beach north until you see the second island just off the coast. Renn is on the far side of that island [64, 17].
This is part of the Missing Diplomat continuation: