RJ Walker / $25 Wreck (1/2)

Shipwreck Robert J. Walker
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
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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Lighting Basics

Feather Blenny

An unplanted aquarium should receive 6-10 hours of light per day. This can be either artificial or natural light. Direct sunlight should be avoided. While in the short run darkness does the fish no harm, how would you like to be kept in the dark most of the time? On the other hand, excessive lighting can lead to dangerous brown or green algae blooms, which can upset the entire balance of a tank, and eventually kill everything. This is caused mainly by excessive amounts of direct sunlight and is not really a problem with artificial lighting.

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