Anachronism - The representation of someone as existing or something as happening in other than chronological, proper, or historical order. ie: Your maritime practice predates your popular genre label. They just called them "songs"... mostly.

Historyextra.com manages to qualify shanty as both "is" and "is not" maritime work song, generally, where the R.N. was concerned, with exception(s.) Good thing they're not writing purchase orders!

"Although contrary to popular belief, the Royal Navy didn’t generally allow shanties as work songs." [historyextra.com]

"The exception to this musical naval rule when working was the use of a fiddler or flautist when manning the capstan to weigh anchor." [Gardiner@historyextra.com]

There are so many "exceptions" the word has lost its meaning.

Also, one suspects the 'boatswain's pipe capstan shanty' is a figment of some landsman's penny dreadful imaginations but... still checking. Calls are not all that musical and actually tuned to be a tad jarring to the ear & brain. They would give prep & execute commands over the fiddle or flute tempo much like a Drill Instructor calling manual of arms to the pace of the march.

PS: When conversing with the cognoscenti, one may drop the execrable “sea.” However, when navigating cyberspace, there are at least nine variations on the theme. But last time I checked, Alexa©® couldn't tell the difference between shanty, chantey, chanty & tzhanteh. The illiterate 19th century sailor was in the same boat.