"Extract 3 contraband packages from the sunken ships in Al Mazrah."
In this mission gameplay video, I collect the three contraband packages needed to complete the UNKNOWN SHIPPING mission.
Here's exactly where you'll find the contraband packages: One on each of the two shipwrecks.
Package #1 is found in the Sawah Village shipwreck; it's the ship that appears to have crashed into the village shoreline, breaking the levy and flooding the city. Enter from sea, through the holes found on either side of the wreck. There's a platform you climb up to reach the level where the contraband is stored. This area is a bit hot for NPC's, so expect to do some fighting to get to the objective.
Package #2 is found in the next shipwreck to the east; it's nearshore in shallow waters near the oil wells. Search for the mission objective near the base of the lonely, single locker wedged betwen two desks and some bunk beds.
Package #3 is found in the fullysubmerged sunken ship immediately east. Don't be fooled! The sunken ship whose bridge is above water? That's not it! There's a place where the shoreline comes to a "point" between the two abovewater shipwrecks; this "points" to the spot; see the video. It's a very deep dive, so scout around, find the mission objective, go up for air, then make your final dive to retreive it. A rebreather is not necessary, but it may help if you're not very good at the water. Remember! You can use the "sprint" key to swim faster! This will help, too.