The HMS Beagle was a Cherokee-Class 10-gun brig-sloop that served with the Royal Navy. The Beagle was later adapted as a survey barque and conducted three expeditions. Her second expedition made her one of the most famous ships in history as she carried a young Charles Darwin, who later penned the Origin of Species.
I think she would make a great ship for use of explorers to survey coastlines, and send expeditions to unknown lands.
Class and type: Cherokee class brig-sloop
Tons burthen: 235 bm
Length: 90.3 ft (27.5 m)
Beam: 24.5 ft (7.5 m)
Draught: 12.5 ft (3.8 m)
Sail Plan: Brig (Barque from 1825)
Complement: 120 as a ship-of-war, 65 plus 9 supernumeraries on second voyage
Armament: 10 guns, reduced to 6 guns on first survey voyage, 7 guns on second survey voyage
HMS Beagle 1:1 Replica hull