Where are the three trolls on the flying dutchman?

There are two in the below decks ( one on each end) and another in the supply room topside ( door is slightly opened ) just after you meet the gunner

One under the grate by the gunner. One through the open door towards the rear of the ship (can also be reached by climbing the stairs if you are still on the same level as the first, or by dropping through the gate directly in front of the deckmaster) the last one is through the open door toward the front of the ship (can also be reached by flying out the window after the first one and flying up one level through another window) yes, I know the windows are called hatches. Good luck.