VSPARS uses single cameras to calculate the stripe shapes for each sail. One VSPARS camera on the foredeck with a wide-angle lens is used for all headsails and gennakers. Two VSPARS cameras, one for each tack, are used for the mainsail.
The coloured stripes are tracked in real-time and the shape is updated effectively in real time, approximately every 3 seconds. VSPARS outputs include stripe coordinates, camber, draft, entry and exit angles and also the twist angle of the stripe relative to boat centreline. The rig bend and sag and forestay deflection or flying luff position is also calculated, leading to the full 3D stripe coordinates in global space for each stripe.
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