A system for indicating to a user a clear shot along a projectile trajectory to a target wherein one of the trajectory path indicators indicates a height of the projectile trajectory at a predetermined intermediate range to the target whereby the user is informed regarding whether or not an obstacle is in the projectile trajectory. The system facilitates accurate, effective, and safe firearm and bow use by providing indications regarding obstacles that are between the shooter and target and which may or may not be in the projectile trajectory. The system may indicate a calibrated aiming point, which is the maximum height of the projectile trajectory. Enhanced rangefinders have digital cameras and high-resolution displays. Some embodiments include a weapon scope, a simulation game device, and a mobile smart phone. A method of using the system.