Category: Tips

Every fisherman who spends much time trolling wants to improve their understanding of trolling depth.  However, if you try to learn more about trolling line curves and lure depth, you may run across a lot of confusing and incorrect information.  This is not surprising, since very few people have observed an actual trolling line underwater…

While fishing by trolling, speed control is one of the most important factors. The Trolling Angles app cannot tell you at which speed you should troll your lure.  That’s between you and the fish.  But it can show the effect speed has on the depth curve. For an introduction to Trolling Angles, first check out…

The Trolling Angles app allows you to measure and use the speed and direction of water currents, while trolling, using only your own fishing rig and your smartphone. Current is Critical Of all the different factors that determine the depth and performance of a trolled sinking fishing rig such as a lure with a sinker…

The Trolling Angles app creates your own depth curve chart for any trolling rig.  A depth curve shows the relationship of line length to lure depth. A trolled line is very complicated, with many different physical factors controlling its shape.  Some of them are: Trolling Angles uses a unique patented method which ignores the values…

This explains the importance of the rod tip height value, and how it relates to the length of the submerged line and the unsubmerged line. There are two separate rod tip height fields, one for the Calibration, and another for the Trolling slider panel. In the Calibration Phase, the user measures a set of line…

The Trolling Angles app makes it easy to create a new depth curve chart configuration by measuring the line angles while deploying your trolling line, and to use the chart immediately.  You do not need to enter any descriptive information such as lure type, speed, line size, or sinker weight. However, if you wish to…

A snap weight is a heavy sinker that is attached to the line with a pincher-like clip.  It can be placed at any point of the line.  A snap weight makes the line’s physics and forces and the resulting curve geometry much more complex, but because Trolling Angles measures the actual resulting line curve, it’s…

The first question often asked about Trolling Angles is “is it accurate?”. I have very little doubt about the theory of the physics of the method and the math used in the Trolling Angles app. Years of software development experience tells me not to deny the possibility of errors in the coding implementation.  However, we…

There is an aphorism in the engineering world: “In theory, there is no difference between theory and practice; but in practice, there is.“ It is fairly well accepted in the “science” of trolling lures that The Trolling Angles web pages and FAQ explain why this is so. One can examine the drag and lift equations…

Here are some thoughts on the geometry of downrigger lines and 2-D sonar displays. This example is based on the data from the previous post “Trolling Angles with Downriggers“. Transponders The transponder is below the surface, in this example by 2 feet. The green area shows the effective span of the transponder’s signal cone. A…