I try for a real traditional nautical flavor. We've got watches: 6 4-hour ones with 30-minute 'bells' in each. Teh average officer works a 4 hour watch, then has another 4 hour that is more admin & other non-bridge duties.
They are : morning (0400-0800), forenoon (0800-1200), afternoon (1200-1600), evening (1600-2000), dogwatch (2000-2400), midwatch (0000-0400). Three shifts: 1 (forenoon-evening), 2 (evening-midwatch), 3 (midatch to fornoon)
At least, that's our deal.
"War is an ugly thing but not the ugliest of things; the decayed and degraded state of moral and patriotic feelings which thinks that nothing is worth war is much worse. A man who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself."
John Stuart Mill