Switch on your shark vision and find the one green mine in this row, then grab
a barrel at the green square on your radar and carefully toss it at this mine
to get rid of it. Grab another barrel and slowly swim through the gap that you
made, then turn right and grab another barrel off the ground here.
Find the green mine and destroy it, then swim forward through the gap and down
to the ground. Take a barrel from this third pile and swim back up, then use
it to get rid of a third green mine. Swim through the gap as you follow the
blood trail to reach a checkpoint.