Long Island Sound averages 60 ft in depth, with the greatest depth of over 300 ft at the eastern end. Tidal effects are strongest at the narrow western end, where all the inrushing water flow piles up and makes tidal variations of up to 7 ft. Strong tidal currents are also prevalent, and visibility tends to be poorer than the open ocean, especially at depth.
This wreck was formerly thought to be the Yankee. However, the "G&D" was identified as the Yankee, leaving this wreck unidentified. It consists of engine, boilers, driveshaft, and propeller, and is reputed to be a good lobster wreck.
The "Three Sisters", as she is called, is an unidentified wooden-hulled vessel. She sits in 80 ft of water some 13 miles south of Atlantic Beach Inlet. She sits on a sandy bottom, spread out over a small area. Her boiler and a 4 bladed propeller are still visible. Wooden beams and planking spread out from the boilers aft towards the propeller. Occasionally some artifacts are found, mostly brass fittings. This is generally a decent wreck for lobsters and spearfishing. This wreck is in a main shipping channel, and large vessels make large wakes, so secure all gear.
Specific gravity is the ratio of the density of a material to the density of water. Materials with a specific gravity greater than 1.000 ( 1.035 in the ocean ) sink; materials with a specific gravity less than 1.000 ( 1.035 in the ocean ) float. Lead has the highest specific gravity - 11.35, except for gold. Gases like air also have weight, density, and specific gravity.
These figures are approximate and should be used only as general indicators.