Methodology & limitations
Understand what is calculated, what is entered, and what remains unknown.
Calculation rules
Enter arrival and all-aboard timestamps with explicit UTC offsets. Display the resulting plan in the selected port timezone.
Subtract disembarkation, transport, activity, tender, and contingency time before judging whether the day fits.
Peak scheduled capacity counts simultaneous overlapping calls, not every ship scheduled at any time that day.
Limits that matter
Verify ship time, port time, all-aboard instructions, and live transport conditions directly. This tool does not guarantee a safe return.
Examples, imports, and source evidence
Example records are illustrative and are not a current public database. CSV and JSON imports are processed locally. A source URL supplied by a user does not mean that the publisher or this tool has independently audited that record. Missing specifications remain unknown. Inspect source dates and revisions before acting.
Reproducible results
Export a JSON plan to preserve the inputs and method version. Table exports contain the complete result, not just the currently displayed page. The printable report includes all result rows. A saved plan stays on this browser until you delete it or clear browser storage. Calendar exports create a snapshot of dates, not continuously updated alerts.
Corrections and commercial independence
Report calculation issues through the linked public source repository using an anonymized reproducible example. Do not include private addresses, serial numbers, personnel records, financial statements, or license-restricted data in a public issue. Advertising cannot change calculations, compatibility warnings, organic order, or source interpretation.