Understand the method through a hands-on measurement.

Four working instruments turn direction, coordinates, hull structure and logkeeping into direct actions.

Working instruments

Choose an instrument

All calculations stay in your browser. Location and log entries are never uploaded.

Convert degrees into a traditional sixteen-point compass bearing and basic heading.

Convert decimal latitude and longitude into degrees, minutes and seconds and validate their ranges.

Select the hull, keel, masts, sails and rigging to see how the structure carries force.

Record date, course, wind and ship condition, then generate a structured log entry.