# Sailing Master M — Sailing performance > Comprehensive sailing data and performance optimization for yachts and boats. (iPhone/iPad app by Pekka Leppanen.) - Source: https://appshunter.io/ios/app/sailing-master-m/id1566599912 (this page in markdown: same URL + `.md`) - Developer: [Pekka Leppanen](https://appshunter.io/developer/1566599914) - Category: Navigation, Sports - Price: Free with in-app purchases (on sale, was $11.99) - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 17 · 22 MB - Languages: American English - Released: 2021-10-07 - Data updated: 2026-07-27 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/sailing-master-m/id1566599912/reviews.md ## What is Sailing Master M? Sailing Master M offers comprehensive sailing data and performance optimization information on iPhones, iPads, iWatches, and ActiveLook smart glasses. The application provides configurable pages and data displays, utilizing over 35 sailing measurements from the boat’s instruments, polars tables, and nautical charts. On phones and pads, the Data and Analog Displays can include minimum and maximum values and time series graphs. The Wind Display provides wind, heading, route, and speed information. The Route Display shows the expected wind conditions on the next legs. The Map Display shows the vessel with direction, tacking and downwind laylines on a nautical chart, or the wind laylines in another location. The connectivity is through NMEA 0813 Wi-Fi gateways such as B&G Vulcan, Zeus, GoFree, Yacht Devices, Signal K, Actisense, and ShipModul. The application has evolved from its initial focus on NMEA data display to encompass a comprehensive suite of features. Consequently, the app’s name has been revised from 'Display0183M' to 'Sailing Master M'. For further information, please refer to the user’s guide available on the app’s website or within the app itself. Terms of use: The app is delivered under the Apple End User License Agreement (EULA, https://www.apple.com/legal/internet-services/itunes/dev/stdeula/) The following libraries and services are used: - Kitura/BlueSocket, published under the Apache 2.0 license - A modified version of GPX package, published under BSD 3-Clause License and copyrighted by Ioannis Silks - OpenStreetMap licensed under the Open Data Commons Open Database License (ODbL, https://opendatacommons.org/licenses/odbl/) by the OpenStreetMap Foundation Licence, and ©OpenStreetMap contributors. OpenSeaMap, which is licensed under the Open Data Commons (ODbL) license, and ©OpenSeaMap contributors The supported NMEA 0183 sentences are: - BWR: Bearing and distance to waypoint - DBS: Depth below surface - DBT: Depth below transducer. - DPT: depth of water. - CGA: Global Positioning System Fix data - GLL: Geographic position Latitude/Longitude - HDG: Heading magnetic - HDM: Heading magnetic - HDT: Heading true - MWD: undocumented, wind direction, wind speed - MTW: water temperature °C - MWV: Wind speed and angle (A,T) - RMB: XTE, range to destination, bearing to destination, destination closing velocity . - RMC: Speed over ground - RSA: Rudder sensor angle - VHW: Water speed and heading - VLW: Distance travelled through water - VPW: Speed - measured parallel to wind - VTG: Course over ground (T or M), speed over ground - VWR: Wind direction (A), wind speed (A) - WCV: Waypoint closure velocity - XDR: air temperature (°C), water temperature (°C) and barometric pressure (mbar). - XTE: Cross track error The data items from NMEA and polars are: - Waypoint bearing - Waypoint distance - Time to Waypoint - VMG waypoint - Cross track error - Depth - Heading - Heading - Course - Course - Water speed - Speed over ground - Water temperature - Air temperature - Air pressure - Wind speed apparent - Wind angle apparent - Wind speed true - Wind direction - Wind direction - VMG Wind - Latitude, Longitude - Waypoint laititude, longitude - Water Distance after reset - Total water distance - Ground distance after reset - Total ground distance - Velocity made good towards wind - Heel - Rudder - Boat target speed through the water - Boat speed of target speed (%) - Beat VMG boat target speed through the water - Run VMG boat target speed through the water - GPS based trip distance - Leeway ## Key features - Configurable data displays - 35+ sailing measurements - Wind, route, and map displays - NMEA 0183 Wi-Fi connectivity - Polars table integration - Nautical chart overlays ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Pro annual | $11.99 | per year | ## Frequently asked questions about Sailing Master M ### What devices does Sailing Master M support? Sailing Master M is available on iPhones, iPads, and Apple Watches, offering a versatile experience across your Apple ecosystem. It also supports ActiveLook smart glasses for enhanced functionality. ### How does Sailing Master M connect to boat instruments? The application connects through NMEA 0183 Wi-Fi gateways. Supported gateways include B&G Vulcan, Zeus, GoFree, Yacht Devices, Signal K, Actisense, and ShipModul, ensuring broad compatibility. ### What kind of sailing data does Sailing Master M display? It displays over 35 sailing measurements, including wind speed and direction, heading, speed over ground, depth, and waypoint information. Data is sourced from boat instruments, polars tables, and nautical charts. ### Does Sailing Master M offer offline functionality? The provided description does not explicitly mention offline functionality. However, it relies on connectivity to NMEA 0183 Wi-Fi gateways for real-time data. ### What are the subscription options for Sailing Master M? Sailing Master M offers a 'Pro annual' subscription plan for $11.99 per year, which includes a 14-day free trial. This plan likely unlocks advanced features or removes limitations. ### How frequently is Sailing Master M updated? The app was last updated on June 2, 2026, indicating a recent update. The previous version was released on October 7, 2021, suggesting a development cycle that may vary. ### What is the age rating for Sailing Master M? Sailing Master M has an age rating of 4+, making it suitable for a wide range of users. This rating suggests no mature content is present in the application. ### What specific NMEA 0183 sentences does Sailing Master M support? Sailing Master M supports a comprehensive list of NMEA 0183 sentences, including those for bearing and distance to waypoint, depth, heading, wind data, speed over ground, and cross track error, among others. ## Version history (last 5 releases) ### 2.5 — 2026-07-09 New: - Retro-style digital data display: for nostalgic and maybe also aesthetic purposes. - Session Statistics summary: displays the current, minimum, and maximum values for each measurement, with the option to log it to a file. - Shallow depth alert in Context Filters: adds displays or lines that activate (or deactivate) when the shallow depth filter triggers. - System colors added to Display colors: for consistency with Apple’s dark/light scheme. - Selection lists in alphabetical order: to facilitate easier and more logical navigation through selection lists. Updated: - Map Display shows the active waypoint, dashed wind laylines - Default pages and displays. Error corrections: - Time to waypoint when closing to it. - Boat speeds in ‘km/h’. - Waypoint XTE short distances for negative values Internal optimizations. ### 2.4.2 — 2026-06-05 Maintenance version 2.4.1 Corrects the default page configuration for new installs. Version 2.4 Map Display - Current Location Display: Show the current location on the map, including direction, tacking, and downwind laylines. - Direction Selection: Select the heading (T) or course (T) for navigation. - Layline Movement: Move laylines based on current wind conditions to assess tacking and other maneuvers. - Map Options: Choose between north or direction-up maps, offline and online maps. - Data Display Integration: Combine the map with data displays for comprehensive navigation. ### 2.4.1 — 2026-06-02 Maintenance version 2.4.1 Corrections: - Tacking layline color: green and yellow are swapped - Layline length’s dependence on latitude - Error in filtering route names Enhancements: - Map Display lookahead update interval increased to avoid repeated back-and-forth changes - Digital Displays’ initial data load immediately after page change Version 2.4 Map Display - Current Location Display: Show the current location on the map, including direction, tacking, and downwind laylines. - Direction Selection: Select the heading (T) or course (T) for navigation. - Layline Movement: Move laylines based on current wind conditions to assess tacking and other maneuvers. - Map Options: Choose between north or direction-up maps, offline and online maps. - Data Display Integration: Combine the map with data displays for comprehensive navigation. ### 2.4 — 2026-05-14 Map Display: - Current Location Display: Show the current location on the map, including direction, tacking, and downwind laylines. - Direction Selection: Select the heading (T) or course (T) for navigation. - Layline Movement: Move laylines based on current wind conditions to assess tacking and other maneuvers. - Map Options: Choose between north or direction-up maps, offline and online maps. - Data Display Integration: Combine the map with data displays for comprehensive navigation. ### 2.3.1 — 2026-03-31 2.3.1: Maintenance update - phones & pads: real time updates for digital and analog data displays (earier: updated every 1/2 second) - watch: User is prompted for the upage configuration updates in order not to update while changing pages ## Apps similar to Sailing Master M | App | Rating | Price | Category | | --- | --- | --- | --- | | [NMEAremote LITE](https://appshunter.io/ios/app/nmearemote-lite/id413937027) | 4.7 (3) | $3.99 | Navigation | | [NMEA Monitor](https://appshunter.io/ios/app/nmea-monitor/id1503075994) | 3.0 (1) | $3.99 | Navigation | | [NavLink HD](https://appshunter.io/ios/app/navlink-hd/id1183848518) | 4.2 (11) | Free | Navigation | | [WilhelmSK](https://appshunter.io/ios/app/wilhelmsk/id1150499484) | 4.5 (28) | $19.99 | Navigation | | [NMEAremote](https://appshunter.io/ios/app/nmearemote/id412806204) | 4.6 (8) | $23.99 | Navigation | | [qtVlm-Companion](https://appshunter.io/ios/app/qtvlm-companion/id1635313892) | — | Free | Navigation | ## More apps by Pekka Leppanen - [Media Viewer M](https://appshunter.io/ios/app/media-viewer-m/id1603250713) - [GPS M](https://appshunter.io/ios/app/gps-m/id1630653269) - [Trek M](https://appshunter.io/ios/app/trek-m/id6503916684) - [GPX M Viewer and Route Editor](https://appshunter.io/ios/app/gpx-m-viewer-and-route-editor/id6740539158) All apps by Pekka Leppanen: https://appshunter.io/developer/1566599914 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-27.*