The thing as I understand is that in the 19th century crews got smaller and the ships bigger, and shanties came in as a way of coping with the workload.

But noone really knows, because people weren't collecting that kind of thing back in the 18th century, and shanties wouldn't have got prionted as broadsides etc.

I'd suspect that rowing shanties might be more likely to have survived unchanged, because the rowing technology for ship's boats didn't really change much. It still hasn't, I imagine. Here's a link to some fellas who might be able to advise

"The 19th century is from 1800 until 1900. The 18th century was from 1700 till 1800." Strictly speaking Erik, the 19th century was 1801 until 1900, and the 18th century 1701 until 1800.

Like the Twentieth Century is 1901 till 31st December 2000, in spite of what they try to tell you.(And if you check back you'll find that everyone was agreed on 31st December 1900 that they were celebrating the end of the 19th century and the birth of the Twentieth. Celebrating! Poor devils...)