The Octans Mk III is both a fibre-optic survey-grade IMO-certified gyrocompass and a Motion Reference Unit for marine applications. It is based on IxBlue’s FOG technology, which outputs true heading, roll, pitch, heave, surge, sway, acceleration, and rate of turn even in highly volatile environments. It is certified to meet the requirements of the International Maritime Organisation (IMO) for gyrocompasses. With no moving parts the Octans III has proven to be very reliable despite being used heavily within the Unique rental pool. An operations manual that details all interfacing options can be downloaded from the attached link.