![]() The authors hope you upgrade (1) for the extra features, (2) to remove the ads, or (3) to show gratitude to the developers. There are often FREE versions of many of these apps with some slight limitation on features. Note to all sailors looking to purchase: Read all instructions, manuals, tips, and reviews for any new app. Smart Ruler Pro has a Plumb Bob Protractor (touch to capture/freeze function), Circular and Linear Bubble Level, and-just for fun-an on-screen ruler/size gauge and thread pitch gauge (with US, Metric, Pipe Thread, and Screw Sizes). Android apps let you tuck the functions of all of these into that marvelous little device in your pocket. “How is Our Trim?”įor measuring how level objects are or vertical angles, traditional bubble levels, protractors, plumb gages, and sextants do a fine job. It has an on-screen bubble level to improve your accuracy. It can measure how high you or an object is (if you know the distance), the distance and bearing (if you know heights) or –Gasp!- even areas. Unless you kill it, it even begins with a graphic reminder of how to do the sight (above). Using heights you input, the internal tilt sensors and the built-in camera, you can get the angle and the software will do the trig calculations completely invisible to you. Your little Green Android Crew now stands ready to do that for you. If you have chart objects of known heights (or local objects like standard buildings whose heights you can estimate accurately), trigonometry tables in Bowditch and angle measurers like sextants that can, used together, let you calculate distances off your vessel. You can sight bearings over the top but this is mostly for fun. Neat, sweet and complete!įor more casual compass work, and to fascinate kids on board, the simple Marine Compass app displays a traditional floating compass on your screen. The drill is: “pop your head up, shoot three quick bearings, drop back to the chart” to plot and, if desired, enter in the log. The bearing and the time are stored to the main screen alongside that symbol and also around the compass ring. BUT WAIT! THERE’S MORE! Touch any of the three graphic symbols at the top (triangle, square, circle) and the screen changes to a simple and intuitive bearing line sight over the top like a “hockey puck” compass and tap. These features alone would be worth a recommendation. The little crescent moon at the top puts the display instantly into night-vision mode. The first screen shows a dynamic compass heading (following the long side of the phone) plus the general cardinal direction, local variation (which is marked “Declination” because they are British, doncha’ know), and handy pitch & roll indicators to remind you to hold your device flat for accuracy, as every good fluxgate compass requires. ![]()
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