Built for the Leith, Hull and Hamburg Steam Packet Co., owned by James Currie of Leith, "O" was employed, as were most of their lighters, on the transhipment of cargo along the Monklands and Forth and Clyde Canals between Port Dundas in Glasgow and the ports on the Firth of Forth.
On 16th July 1879 with, 3 crew under her Master J. Thomson, she departed Leith for Glasgow, carrying general cargo and one passenger. Soon afterwards, at a point between Bo'ness and entrance to River Carron, she collided with the steamship "Avon" of Grangemouth. Her master lost his life in the incident and the vessel was declared a partial loss.
Her only recorded change of ownership was in 1920 to John McLachlan of Tighnaraid, Kilfinan, Argyll
I dont know at this time how many of these alphabetically named lighters that they owned, or even if the letters were used in sequence - at the moment I have a record of "Z " and so they could have had as many as 26 although probably not all would have been powered..