There is much to be seen in this photograph. The "newt suit" is the yellow robot-like "creature" on deck. Inside an operator can operate at great depths but at one athomosphre pressure (or one newton pressure - hence the name newt suit). It is powered from the surface and controlled by both the encased operater and crew ship-side.
Beside this is the red 2-man submarine. More details to follow. Next to the submarine is a small ROV (robotically operated vehicle). The scale of these machines is interesting. The ROV is so small it is difficult to see on the gunnel with 3 crew inspecting it. Small it is, but very useful too - such is the speed of progress in the area of underwater technology