A system for and method of detecting and placing a line at a depth within a body of water comprises a reel for dispensing a quantity of line and an accelerometer for detecting a deviation of the dispensed line from a vertical axis. Based on the deviation of the dispensed line from the vertical axis and the amount of dispensed line a depth of the dispensed line within a moving body of water is able to be calculated. Additionally, based on the deviation of the dispensed line from the vertical axis and the desired depth of the line within a moving body of water, a necessary amount of line for the desired depth is able to be calculated.
