iPad Screenshots


Tack Pack is an iPad passage planning tool for sailors. It computes tacking solutions for up or down wind destinations under selected wind and current conditions. Tack Pad uses Polars to estimate speed and leeway and will provide estimated time of arrival as well as detailed information about the course and tacks.

Tack Pad is not a chart plotter or GPS navigation app, but a tool to use in conjunction with a navigation app or with paper charts.

Tack Pad supports multiple waypoints, entered as bearing and distance along with wind and current, and computes course to steer, speed over ground, time on tack (ETA to tack points), overall ETA, VMG along waypoint bearings, as well as cross track error from tack points to waypoint bearing lines. The app will produce downwind solutions as well, including downwind gybes.

The interface is interactive, simply drag wind barbs, current arrows, tack points and waypoints to explore the options available to you. Solutions are computed as you drag items around, so it’s very easy to rapidly explore multiple scenarios.

Wind speed and direction as well as current set and drift can be modified on each waypoint or tack point to produce a complete multi-waypoint solution. This allows you to explore solutions involving changing weather and to explore course options and possibilities.

Speed and leeway estimates are computed from three included polar files which can be scaled to fit your boat characteristics, or you can load your own for more accuracy. Waypoints can also be put into a manual mode which allows you to specifically set leeway and speed over ground values. This is useful for situations where the computed values don’t match reality, or you simply want to motor on that leg of the trip, or are forced to motor due to wind or current.

What’s New

Version 1.3

- Latest IOS look and feel
- Added the option to limit a polar plot's pointing angle

Ratings and Reviews

4.0 out of 5
1 Rating

1 Rating


Tack Pad

Simply an outstanding ap! Very intuitive interface. This beats S___ T___ 9 ways to Sunday. I particularly like that it properly annotates course, bearing, distance and time directly on the appropriate vector.

For course planning, I download the GRIB files and use iNAVx to get the rhumb line and distance, then use Tack Pad to plan the optimal route and tack points.

For the record I have probably a 100+ Aps and this is the first one that I felt positively enough to generate a review. It addresses a missing need and is easy to use. No affiliation whatsoever w the ap developers.

App Privacy

The developer, Rudder Nut LLC, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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