Write a useful passage log
Keep manual logbook entries separate from Voyage Story notes, so formal records and personal trip memories do not get mixed together.
Free Software and Apps for Sailors
Plan the passage. Check the boat. Find what you need.
KSF Passage Companion is a practical iPad app for logbook entries, boat inventory, readiness checks and provisioning. It is made for use onboard, with no account, no ads, no subscription and no paid extras.
Free
No subscription, in-app purchase or advertising.
Offline
Useful onboard even when internet is weak or unavailable.
Private
Your boat data stays on your device unless you choose to share it.
Practical
Built by a sailor around the routines real boats repeat.
Made for the jobs sailors repeat before and during a trip.
This app is not trying to replace your navigation software. It handles the ordinary onboard organization that can become messy quickly on a real boat.
Find gear faster
Use Where Is? to track safety gear, tools, spares, stores, service items and expiry dates before you need them in a hurry.
Prepare food and checks
Plan provisioning, water and watch snacks, then run readiness checks before coastal sailing, passages or ocean crossings.
Actual screen shots
Light and dark mode enabled.
Available now
These tools are ready to try now. Start with the free iPad app if you want a simple first step, or use the Mac apps when you want deeper passage planning, NMEA diagnostics and AIS forwarding workflows.
KSF Passage Companion for iPadUse one onboard app for logbook, inventory, provisioning, readiness checks and backups.Works standalone, offline and private, with optional shared workflow with the Mac version.
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KSF Passage Companion for MacPrepare, record and review passages from a Mac with deeper setup, exports and NMEA-assisted log entries.Works with shared boat data and iPad handoff without silent overwrites.
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KSF NMEA SnifferSee what is really happening on your boat data network without drowning in repeated frames and raw hex.Supports NMEA2000/CAN, NMEA0183, Signal K, USB serial, UDP/TCP and common adapter text formats.
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KSF AIS DispatcherForward selected local AIS data from your Mac to approved receiver services.Reads serial, UDP and read-only Signal K sources, validates NMEA0183 checksums and forwards approved AIS sentences over UDP.
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Under test
KSF Boat Watch for Mac
Native macOS watchkeeping and alarm app for read-only Signal K, NMEA0183 and NMEA2000/CAN input. It will show a live boat dashboard, user-selected watch points with warning and alarm limits, anchor watch with circle or ellipse fences and a map trail, sleep/watch timer, boat-health alarms for battery, shore power, bilge, tanks and stale sources, alarm snooze and history, audible Mac notifications, and a read-only iPhone/Apple Watch status bridge.
KSF Timer for iPhone
Native iPhone watchkeeping timer app for the SailingKSF Autopilot Suite. It is being tested as a companion control surface for the same timer state shown on the helm UI display and the separate timer modules, so start, snooze, acknowledge and reset actions stay visible across the boat. Push notifications are supported so important alarms can still arrive when the phone is locked or in sleep mode.
Waveshare Timer Unit
Battery-powered WLAN timer unit under test. It can be carried around the boat, but it still behaves as one shared timer unit on the network: it talks with the other timer modules and mirrors the same watch alarm state instead of running a separate local countdown.
- Offshore autopilot research
- NMEA2000 modules
- Weather and safety logic
- iPad and helm workflows
For sailors who want the boat organized before departure, and easier to manage once the passage is underway.