Shipwrecks


lightship mast
lightship mast

Possibly the most preposterous artifact that has ever been recovered is one of the masts from the Lightship Relief. Over 50 ft long and weighing some 6000 pounds, the mast was recovered by divers in 1976 and set up in front of a dive shop in Laurence Harbor. ( It was called "Diver's Cove". )

The dive shop has long since closed, and the huge mast now lies off to the side, a rusting eyesore. The present owner of the property claims it is a registered historic landmark. Apparently not so - as of March 2008 it was hauled away as garbage. Better that it had just been left in the sea, but this is the fate of many divers' "artifacts."


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.


steam-powered winch
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.


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.



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.


Tunas

by Bruce Freeman

Six of the world's 13 tuna species occur off New Jersey each year. Among the most beautiful and powerful of sea creatures, the tops of their heads and their upper backs are either solid or wavy lines of dark, lustrous, metallic blue. Their sides are silver or silver-gray, often with silvery spots, bands, and iridescent hues of purple, pink and gold and silvery-white on the belly. Most young tunas have striking vertical bars along the body flanks, although these disappear with age. The beautiful coloration and patterns serve as camouflage.

Printed from njscuba.net