Adelaide, 1800, Royal Navy, Branches of the boat in a sea mystery

Several members of my family have been involved in the British Royal navy from Galleons to ELCO PTs. But one family member (as his name is to yet to be found, his character is defiantly not lost). He sailed Tasmania on sea and land setting roads in Adelaide, as being one the first of my family members in Australia. He helped develop Adelaide as well as the rest the crew. A small park is named after superiority in the development of Adelaide. ( I am still finding his name through my family book, the heirloom ages from 18th and 19th century - and so on).