A drill rig having a longitudinal drilling axis, a front portion, and a rear portion, the drill rig comprising: a feedframe aligned with the longitudinal drilling axis; a first head assembly coupled to the feedframe and configured to rotate a drill string; a rod holder proximate the front portion of the drill rig and configured to grip an outer surface of a first drill string component of the drill string; a second head assembly that is movable on the feedframe along the longitudinal drilling axis, the second head assembly comprising: a powered water swivel assembly comprising: a spindle having an interior bore; a drill rod connector at a first end of the spindle; a motor that is configured to rotate the spindle; a clutch configured to disengage the motor from the spindle; a gearbox that couples the motor to the spindle; and a water swivel that is configured to provide drilling fluid to the interior bore of the spindle; characterised in that, the drilling rig further comprises an overshot loading assembly and; an actuator configured to move at least a portion of the second head assembly between a first position in which the powered water swivel assembly is aligned with the longitudinal drilling axis, and a second position in which the overshot loading assembly is aligned with the longitudinal drilling axis. a feedframe aligned with the longitudinal drilling axis; a first head assembly coupled to the feedframe and configured to rotate a drill string; a rod holder proximate the front portion of the drill rig and configured to grip an outer surface of a first drill string component of the drill string; a second head assembly that is movable on the feedframe along the longitudinal drilling axis, the second head assembly comprising: a powered water swivel assembly comprising: a spindle having an interior bore; a drill rod connector at a first end of the spindle; a motor that is configured to rotate the spindle; a clutch configured to disengage the motor from the spindle; a gearbox that couples the motor to the spindle; and a water swivel that is configured to provide drilling fluid to the interior bore of the spindle; characterised in that, the drilling rig further comprises an overshot loading assembly and; a powered water swivel assembly comprising: a spindle having an interior bore; a drill rod connector at a first end of the spindle; a motor that is configured to rotate the spindle; a clutch configured to disengage the motor from the spindle; a gearbox that couples the motor to the spindle; and a water swivel that is configured to provide drilling fluid to the interior bore of the spindle; characterised in that, the drilling rig further comprises a spindle having an interior bore; a drill rod connector at a first end of the spindle; a motor that is configured to rotate the spindle; a clutch configured to disengage the motor from the spindle; a gearbox that couples the motor to the spindle; and a water swivel that is configured to provide drilling fluid to the interior bore of the spindle; characterised in that, the drilling rig further comprises an overshot loading assembly and; an actuator configured to move at least a portion of the second head assembly between a first position in which the powered water swivel assembly is aligned with the longitudinal drilling axis, and a second position in which the overshot loading assembly is aligned with the longitudinal drilling axis.