A major incident has been declared after the huge research vessel RV Petrel toppled over at Edinburgh's docks, leaving multiple people injured.
Shocking images of the incident, which occurred shortly before 9am on Wednesday morning, show the stricken 250ft ship tipped over to one side at the Imperial Dock in the Leith area of the city.
But what is the RV Petrel, who owns it and how long has it been in the capital? We take a closer look.