RJ Walker / $25 Wreck (1/2)

Shipwreck Robert J. Walker
Type:
shipwreck, side-wheel steamer USA
Built:
1847, Joseph Tomlinson, New York NY USA
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
Shipwreck Robert J. Walker
An anchor
Shipwreck Robert J. Walker
Another anchor, with the first one in the background
Shipwreck Robert J. Walker
A paddlewheel hub
Shipwreck Robert J. Walker
An engine
Shipwreck Robert J. Walker
The research team
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regulator

There are a variety of choices you can make here, mainly concerning adjustability. High-end second stages come with one, two, or even three adjustments. Some are actually useful, others are pure marketing nonsense. With thick gloves on, you may not even be able to work them in the water. All user-accessible adjustments have a much narrower range of operation than the internal adjustments that a technician can make. My experience is that if a reg is malfunctioning, the user adjustments will be useless to stop it. On the other hand, if you're a gadget person who likes to fiddle with things, some of the adjustments actually can make a noticeable ( although not essential ) difference in breathing. On the theory that extra moving parts are extra failure points, I would avoid adjustable regulators, but that's not really possible anymore. With most manufacturers, the non-adjustable regs are the bottom of the line, and you don't want that, so buy a good reg, and if it has a few useless bells and whistles, live with them.