Abstract
Woods from five old ships wrecked in the Indian Ocean over the period 1629–1886 have been studied by Fourier transform infra-red spectroscopy, by solid state 13C nuclear magnetic resonance spectroscopy and by pyrolysis gas chromatography/mass spectrometry. The results from all three techniques strongly support each other. It is shown that samples of outer wood in closer proximate contact with the marine environment have lost carbohydrates, whereas the inner wood is relatively intact. There appears to be no correlation between the age of ships and degradation, however one wreck ( James Matthews) which is located at an anaerobic site appears to have undergone little or no degradation, unlike the samples obtained from aerobic sites.
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