It happened on the B3081 near Verwood - he had to be cut free by firefighters.
Investigation After Man Dies In Isle Of Wight Boat Crash
Police are continuing to investigate the death of a man, after the dinghy he was in collided with a luxury yacht off the Isle of Wight.
Hampshire Constabulary is now in a position to name the man who died after the collision at sea in Osborne Bay.
Ryan Scott McKinlay, aged 36 and from Gosport, was travelling as a passenger on a Rigid Inflatable Boat (RIB) on the afternoon of Friday - when a collision occurred with a larger motorboat, which had been carrying the RIB on the Solent earlier the same day.
Mr McKinlay was taken to hospital where he was pronounced dead on Friday evening (19 June).
All immediate next-of-kin have been informed.
His body has been formally identified.
A post-mortem examination to help establish the cause of death will take place in due course.
Officers would like to thank all partner agencies and members of the public for their ongoing co-operation and assistance with police enquiries so far.
Anyone with information or who saw the collision in Osborne Bay between 4.45pm and 5pm on Friday, June 19, 2015 can contact Hampshire Constabulary by phoning 101. Mini-com users can phone 18001 101.
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