Sea life, rigs and wrecks
So what will scientists and sight seers catch a glimpse of?
'At 50 metres sea life is abundant - big shoals of striped bib, or conger eels, lobsters and crabs living in shipwrecks.'
Louise Trewavas, diver
'The sub can be used to take pictures and video footage. Marine biologists examine the impact of oil rigs and ship wrecks by seeing what's growing on them. Photographs give you a good idea of what's down there so you can choose what to sample with a grab arm.'
Jenny Beaumont, marine biologist
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