A watch is a recordable unit
Watchkeeping divides responsibility across time, place and task. Deck logs can preserve the formal outline of that system, even when they do not describe everything a sailor noticed or remembered.
Small ships make the arrangement visible
On a compact vessel, work areas, machinery and lookout responsibilities sit close together. That physical proximity helps a reader understand why routine, communication and handover mattered, without requiring an invented first-person account.
Research the ship, then generalize carefully
This guide explains the practice at a useful general level. To claim a particular watch bill or daily rhythm for Phoebe, a researcher would need the relevant logs or another source that names the ship and period.
Source note. This page separates documented history, archival observation and editorial explanation. Where a source does not establish a detail, the detail is left open.