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

A "same-source" octopus is an extra second-stage regulator that attaches to the same first stage and air supply as your main regulator. Your own same-source octopus is only useful to your buddy, and then only if you are together. The only same-source octopus that will be of any use to you in an emergency will be your buddy's, not your own, and again, only if you are together. In the tropics, where you can see your buddy 100 ft across the reef and the likelihood of getting separated is slim, this scheme can work very well.

However, in the low visibility conditions of the North Atlantic, counting on your buddy to be there with your emergency backup air supply when you really need it is courting disaster. You can not and should not rely on any air source that is not on your own back.