A gold mining operation required an HD camera for a borehole inspection. The basic requirements were that the camera to remain steady and centred, down a 760 m vertical borehole. Inuktun took on the task, the challenges of which were:Limits of sending data via copper tetherChanging specificationsEnhanced braking system required to handle the weightThe solution developed included a Spectrum 120HD camera. The tethers were developed to provide power via copper and signal via fibre. A spring-loaded centring device accommodates the 200-600 mm hole. Auxiliary lighting was installed for the larger diameter bore.Inuktun also integrated a digitiser to convert HD video signal for fibre optic transmission and developed enhanced braking and cable controls.