RJ Walker / $25 Wreck (1/2) ~ New Jersey Scuba Diving

RJ Walker / $25 Wreck (1/2)

Type:: shipwreck, side-wheel steamer USA
Built:: Nov 27, 1847
Specs:: ( 133 x 31 ft ) tons
Sunk:: June 21, 1860
collision with schooner Fanny
Depth:: 85 ft

This site was found in the 1970s by a commercial fisherman. The numbers were sold for $25, hence the name. Originally an armed Revenue Cutter like the RC Mohawk, the Walker was found to be less than satisfactory - the early steam propulsion systems were troublesome and inefficient. Eventually, the vessel was transferred from the Revenue Service to the Coast Survey Service, where it proved to be a vast improvement over the sail-powered vessels of the era for this sort of work. Being self-propelled, the Walker could simply motor up to the survey site and easily stay on station, not subject to the vagaries of the wind. The wreck was positively identified in 2013.

Shipwreck Robert J. Walker side-scan — Side-scan sonar image with the bow at the top

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Capstans & Winches

A steam-powered winch on a schooner barge. Note the various drums for drawing up anchor chain, towing hawsers, etc, and the anchor chains themselves going down through the deck into the chain locker below.

Prior to steam power, the only force available on a sailing ship to perform all the necessary work was the men on board. For some tasks, such as raising the anchor, it might be necessary to yoke the entire crew to a multi-deck manual capstan. On the largest vessels, even with every available man, this might take several hours to complete. With the advent of steam power, a "donkey engine" and a single engineer could do the work of many men, in less time, and these were soon installed in almost all vessels.

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