Notice the blocky shape and structure of this stranded but otherwise typical old wooden barge. Barges usually have minimal crews, to tend the lines.
A barge is a vessel that does not have its own means of propulsion ( usually. ) Barges are towed or pushed from place to place by tugboats, or anchored in place to serve as temporary work platforms, floating docks, or storage. Some barges are self-propelled, in a limited way. These are known as scows, and their limited propulsive power restricts them to protected waters without the assistance of a tugboat.
The Alex Gibson shipwreck is the remains of a wooden barge. The barge was built in 1877 was 180 ft long and displaced 2154 tons. She was sunk in the 1930s and now sits in 40 ft of water on a clean sand bottom.
Aerial shot of the entire Manasquan River estuary, looking southeast. The Railroad Bridge dive site is at the upper-right.
The Manasquan River is overall not as nice a place to dive as the Shark River. The currents are stronger, the water never seems as clean, and the bottom is silty wherever it is not covered with mussels. The inlet jetties can be downright dangerous, and the boat traffic in the channel there is often very heavy. Off the north jetty is the so-called "Manasquan Wreck", but this is a long swim from shore and probably best approached with a boat.