[1] His father was Johann Georg Christoff Schetky, a celebrated composer and cellist, who had settled in Edinburgh in 1773, and had married Maria Anna Theresa Reinagle, also of Hungarian descent, in 1774.
Following the abolition of the Naval College, he held a similar professorship from 1836 to 1855 at the East India Company's Military Seminary at Addiscombe, Surrey,[2] where the cadets nicknamed him "Sepia Jack".
[3] From 1805 to 1872 he contributed periodically to the Royal Academy summer exhibitions, and he was represented at the Westminster Hall competition of 1847 by a large oil painting of the Battle of La Hogue.
[2] Among his published works were the illustrations to Lord John Manners's Sketches and Notes of a Cruise in Scotch Waters (1850); and a volume entitled Reminiscences of the Veterans of the Sea (1867),[2] which containing photographs of twenty of his paintings and drawings of the great wooden fighting vessels of the Royal Navy.
The United Service Club formerly possessed another important marine painting, showing HMS Endymion, under the command of Sir Charles Paget, rescuing a French man-of-war from extreme danger of shipwreck.