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Courses
Course editor
Distances accept units: 45, 35ft, 15m. The middle box is the shot angle in degrees — uphill positive, downhill negative; leave it blank for level ground. Marks fill in automatically from the active bow, angle included — type one only to override it. Add a row per stake for walk-ups.
Backup
Bow setup
Trajectory details (optional)
These shape the curve between and beyond your marks. Leave blank for a typical bow of this type; enter your chrono speed for tighter estimates. Drag is how much arrow speed is lost over 70 m of flight (research-measured ≈8% for target arrows; more for feathers/broadheads).
Base marks
Quick calculator
Group adjustment
Shot a sighter and landed off? This converts the miss into a mark change — the practical way to handle a cold day, a new altitude or a fresh string, without touching your base marks.
Sight tape
Calibrate the scale: dial your sight to two known marks and measure the travel between them in millimetres.