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Why keep a sailing logbook at all?

Jul 8, 2025 · Sailing Log

Every generation of sailors rediscovers the logbook. It starts as an obligation, becomes a habit, and ends up the most-read book aboard.

The practical case

A logbook answers questions your memory will fail at: when the engine oil was last changed and at what hours, how long the beat to your favorite anchorage actually takes against a westerly, what that strange rattle was the last time it appeared, and which crew were aboard when. Insurers and, in some jurisdictions, authorities also treat a kept log as evidence of competent seamanship.

The honest case

Most of us keep logs because seasons blur. Forty sails into the year, the Tuesday evening with the perfect 12-knot reach is gone unless something wrote it down. A log turns a season into a story you can revisit.

What a modern log should capture

Paper does all of this badly and GPS not at all. A phone does all of it automatically, which is the whole premise of Sailing Log: tap record when you cast off, and the boring half of logkeeping does itself while you sail.

Sailing Log is a private-by-design logbook for iPhone & iPad: GPS tracks on nautical charts, an anchor alarm, passage plans, and share-worthy trip cards. Learn more →