This site is really just a jumble of machinery. Anything resembling a ship has long since disappeared. Various clues around the site would seem to indicate a wooden-hulled trawler, probably built before the war ( WWII ) and sunk sometime after.
Shore diving is very much dependant on the tide. Tidal inlets and rivers will flow with the tide, such that a river may even flow upstream for a time when the tide is incoming. Normal river currents are far too strong to swim against, and will simply sweep away a loaded diver. Many inlets have time restrictions for divers, so you will have to take the local laws and the tide tables into account to work out a good dive time.
However, there are two times when the currents drop to near zero. Those are dead high tide, and dead low tide. Of the two, dead high tide is usually better, simply because there is more water, and it is cleaner ocean water rather than silty river water. You will get about a half-hour window on either side of dead high tide during which you can either drift in the weak current or swim against it. After that, you'd better get out.
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