That was a weird one.
[Spoiler]First run I realised I was waaaay behind the convoy so 2nd time I thought I'd cut them off at the pass and went for a nearby point after finding the route. There, waiting, were 4 guys from another PF and a vehicle. Managed to take them out but the convoy just came straight past. They went full pelt to the end and at a sprint I could just about keep up with the rear tank, but not actually do anything to any of them, so I'm wondering how the fuck I'm meant to do this. They get to the end of the route and just park the truck on a pier. I sneak close, aiming to get to the end of the pier, where nobody's around as they're all on land. Skulls jump out, but none behind the truck so I just sneak up, fulton the thing, jump back into the water and run like hell. First direction I found the bloody area wall so couldn't go any further so just ran alongside it until I was out of the mission area with skulls chasing/shooting around.[/Spoiler]
I think it's going to be like Ground Zeroes in that when you actually know the patrol routes and what targets are going to do, you can ignore mission intel and just plan your own swift way to get the objective done.