Wednesday, 3 August 2016


Without trying to over simplify the arduous task of establishing the sites of wrecks using side scan sonar, once an unidentified and distinctive iron hull mass (having excluded iron in seabed rock) is established, it could theoretically be possible to identify other metal components by means of unique sound transmission properties. Let's say for argument's sake there are the remains of a steamer off the Wild Coast, buried in silt. It might take a long time to establish the identity of such a steamer requiring painstaking archaeological-based techniques to clear overlying sediment and identify unique features without damaging the overall integrity of the wreck. Surely one could use more specific sub-bottom sonar profiling to establish the presence of:

1) Lead - transmits sound at 1960 - 2160 m/s    
2) Copper - transmits sound at 4600 m/s
3) Gold - transmits sound at 3240 m/s
4) Silver - transmits sound at 3650 m/s
5) Iron - transmits sound at 5130 m/s 

These are probably the musings of a very naive Blogger, but theoretically it could help to establish if an unidentified wreck, at the very least, was carrying 75 tons of copper.

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