Short answer
The phrase “maiden voyage” is not always used consistently. Before deciding that two dates conflict, determine what each source means by “first voyage.”
Several different “firsts” can exist
Delivery or positioning voyageThe ship may sail from the builder’s yard to its operating port before carrying paying passengers.
First passenger sailingThis is often the most useful meaning of maiden voyage, but not every source uses it consistently.
First transatlantic voyageA vessel may already have completed a shorter passenger voyage before beginning the route remembered as its primary service.
First voyage for a new ownerTransferred and renamed liners can acquire a second “maiden” date in publicity or later histories.
Dates can also straddle midnight and ports
A voyage may be dated from departure at the originating port, from a later principal port, or from the day the ship cleared the final European call. Multi-port services make a single shorthand date especially vulnerable to ambiguity.
How Ocean Liner Curator handles it
- State what kind of first voyage the date represents whenever ambiguity matters.
- Prefer contemporary sailing records, company timetables, passenger lists, and port records over unsourced retrospective dates.
- Do not force a single date if two reputable sources are clearly describing different milestones.
- Use “entered service” when that wording is more accurate than “maiden voyage.”
Chronology principle: terminology should follow the evidence, not the other way around.