Rowing power measurement

A rowing-boat oarlock-installation comprising:

• an upright pivot pin,
• an oarlock mounted on the pivot pin, and a power module attached to the oarlock,
• the power module comprising means responsive to rowing of the rowing-boat to derive force measurements in accordance with rowing forces exerted on the power module during the rowing, and
• means responsive to angular displacements of the oarlock during the rowing to derive angle measurements in accordance with angular displacements of the oarlock during rowing relative to a datum angle,
• wherein the oarlock-installation includes means for deriving a computation of power exerted during the rowing in accordance with the force measurements and the angle measurements, and the datum angle being defined as an angular displacement of the oarlock relative to the pin in which a beam of light, projected from the oarlock, is aligned with a distinctive mark on the pin.

An oarlock of a rowing boat comprising:

• an oar for rowing the boat,
• an upright pivot pin mounted on the boat,
• an oarlock mounted on the upright pivot pin, and
• the oar engaging the oarlock to exert force on the oarlock in angulary displacing the oarlock about the upright pin,
• the oar being engaged with the oarlock to exert force on the oarlock in angularly displacing the oarlock about the upright pivot pin of the boat during rowing of the boat,
• means for deriving a measure of the force exerted on the oarlock through the angular displacement of the oarlock, and
• means for deriving a measure of the angular displacement relative to a datum angle, wherein the datum angle is defined as an angular displacement of the oarlock relative to the pivot pin in which a beam of light projected from the oarlock is aligned with a distinctive mark on the pivot pin.