Bullen's "knots per hour" is (are?) too much for my Conchy authentic bone, but that's just me. Either way, not finding a work song mention, for any trade or era, is the norm by a very wide margin.

On the pages, the Cachelot would have a Protestant management (call) and Catholic labour (reply.) Thank the Lord for awkward silences.

Fwiw: Real world Catholic maritimes all dropped their mandatory salty church music at the end of the Inquisition and Napoleonic Wars. Methinks the pirate opera theme of cheerily cosmopolitan, multinational, multilingual, nondenominational shantying crews wouldn't/couldn't even work with an all Irish ensemble.