I agree that the poem was probably trying to cash in on currents events, associating itself with the ship-of-line Victory. However, it may not be atyphical of other broadsides in that they were often composed to take advantage of current events to attract sales.
There is no sign of this one in John Ashton's collection of broadsides entitled REAL SAILOR SONGS (1905) nor in DIBDIN'S SEA SONGS (1854).