Shipwrecks

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towing bit
A huge towing bit in use on a turn-of-the-century tugboat. Notice the smaller deck cleat and the steam-powered capstan in the foreground.

Anchors

wooden-stocked anchor
An old-style wooden-stocked anchor stowed alongside on a sailing ship. Note the two hawsepipes where the mooring chains enter the bow.

Not all artifacts are easily recoverable. Ship's anchors often weigh in the hundreds or thousands of pounds and require a well-planned expedition to bring back to shore. At right is an assortment of anchors, from the old-fashioned "Fisherman's" anchor of the 1800s to the modern stockless or "naval" anchor, and its small cousin, the Danforth anchor.



shipwreck SS Delaware engine

Steam Engines

Steam engines are a common sight on New Jersey shipwrecks. Usually the highest point of relief on the entire wreck, the engine makes a good orientation point and is often used as a tie-in as well. Old steam engines were quite sturdily constructed, and last a long time in the ocean, although because of their value they were salvaged when possible.

Right: The single-expansion steam engine of the Delaware, viewed over the top of one of the four boilers.


Wooden Ship Framing
Wooden Ship Framing

Wooden ships have been constructed for thousands of years. Around the world, many different construction techniques have been used, some of them quite extraordinary. The ancient Greeks stitched the planks of their warships together edgewise to form an extremely light frameless load-bearing shell, much like a modern airplane fuselage. However, most wooden ships are built using a basic framing system that has changed little over the centuries.


composite ship construction

Iron and steel began to replace wood in ship construction in the middle to late 1800s. Timber-poor Europe ( especially England ) led in the development of iron ships, while America, with its vast reserves of lumber, continued to build wooden ships for some time longer. However, as the economical size of ships grew to surpass what could be built of wood, America too began constructing iron ships. For a few years, composite ships were built with iron frames and wooden skins, as seen at right, but difficulties with corrosion between the wood and metal soon led to hulls built completely of metal, both sailing ships and steamers.


Canada Goose

Branta canadensis

Size: 25-43"

Habitat: in and around water

Notes:
The cows of the avian world, geese are one of the only types of bird that eat grass. Their large size is necessary to carry all of the required digestive apparatus. Geese are supposed to migrate through our area, leaving only very small resident populations, but they have taken to our grassy parks and campuses so well that now huge populations live here year-round.

Printed from njscuba.net