His pneumatic rifle ready, one diver provided protection from any aggressive sea life while the other two explored the wreck. Mostly they found nothing of interest, but a locked trunk in the captain's cabin holds some promise. The submarine in the background is Ig Yerm's imaginatively realized Future Winans Steam Ship, available at ArtStation and other sites. The divers are M4 in Cybertenko's Deep Sea Diver suit with the steampunk helmet variation. The chest is from the MM Nautilus and the wreck is IN Wavecutter. The sea life consists of sharks from Shark Attack, Sea Turtle and Tuna from DAZ, and several fish from the now gone PlanIT 3D. The environment is Nemo's Hunting Ground. The scene was composed and rendered in Poser using Atmosphere for the depth effect.