Weld Question

Dave recently sent this picture in via our facebook page, while he was on vacation on the east coast. His question for Tom had to do with the type of weld used on this underwater exploration vehicle.
Tom thought the machinery looked like it was built out of steel with an aluminum or zinc paint applied. The weld looks like an arc weld that was done with either 6010 or 6011 welding rod. Tom thought the weld looked “cold”, meaning that whoever fabricated the piece did not have the amperage turned up.
The object looks like a deep sea retriever device. Something used to remove debris from a sunken ship or perhaps even take pictures. Tom wasn’t sure on second look weather it was made out of steel or not. He thought it could be aluminum with a bad mig weld.