KNOW WHAT YOU’RE LOOKING AT

Sources, coverage
& corrections.

ReadyBoatGo brings planning information together. Each source has a different purpose, date and level of coverage. A recent retrieval does not make an old observation new.

Harbours and shore stops

Harbour search combines 41 featured locations with World Port Index and OpenStreetMap entries. The legacy World Port Index source is dated December 2019. A directory entry does not establish a safe entrance, available berth or current harbour service.

Harbour guides use dated, named OpenStreetMap places within 5 km of each featured harbour. Maps can omit businesses or include out-of-date entries. Distances are approximate straight lines. Shop listings show their source snapshot and retrieval date. OpenStreetMap data is available under the Open Database Licence; the planner offers downloadable derived records.

Weather and tide information

Open-Meteo supplies weather and marine model estimates. A modelled sea-level curve is not a harbour tide table or a measured tidal height. Station predictions and local tidal-gate calculations are labelled separately where available. Use official charts, tide tables, notices and local advice for navigation.

Marine fuel prices

Supplier pages currently provide prices for Boatworks Castle Emplacement and QE2 Marina in Guernsey, and Cowes Harbour Fuel Berth. Check times describe retrieval from those pages. Saved quotes retain their original date.

The comparison includes recorded stations within 5 km of the selected harbour. Lowest-price highlights require at least two quotes checked within 24 hours, with matching fuel, currency, unit and duty basis. Fill totals exclude the cost of getting to the station. Confirm the actual price, access and fuel suitability with the supplier.

Corrections and personal notes

Use the map-record link beside a place to report a map correction through OpenStreetMap. Use the supplier link to verify or query a fuel price. For a ReadyBoatGo calculation, coverage or display error, contact 37X Ventures and include the page, harbour and the source you checked.

Saved trips, vessel settings, checklists and personal fuel notes stay on your device. They are separate from published supplier quotes. Personal fuel notes are not used to rank stations.

Historical records

Dated source snapshots are retained so changes can be checked without replacing their earlier evidence. Forecast retrieval times, forecast valid times and supplier check times remain distinct. Historical coverage is limited to the sources collected; a missing value is not zero.

Method reviewed 9 September 2026.