Trackable marker dispenser

A dispenser for dispensing and attaching individual markers to a reference array of a tracking system, the dispenser comprising:

• a housing defining a cavity therein extending along a longitudinal axis of the housing and the housing having a dispensing end defining a dispensing aperture of the cavity;
• a plurality of markers stacked within the cavity, each marker having a marker attachment feature by which the marker is attachable to an attachment site of a reference array, and wherein the dispensing end provides a retainer exerting a retaining force on a bottom most marker sufficient to retain markers within the cavity but permitting the bottom most marker to be released from the cavity via the dispensing aperture when the bottom most marker has been attached by its attachment feature to the attachment site of the reference array.