I forgot to mention that I am not sure how easy it is to use the new laser measuring devices.
Easy to use, ambient light does not interfere. Measurement is specified at 1 mm, bias at less than 1.5 mm on this model (if you can believe specs). This is better than the USMS requirement of 5 mm resolution.
www.amazon.com/.../B003Q6FGR2
Jeff demo'd this device for me yesterday, pretty slick.
The thing is, the trend is for devices to be getting easier to use and cheaper to purchase; quite a few LMSCs are purchasing one. So the USMS model of expecting more measurements to confirm bulkhead placement is perhaps getting more and more desirable over not measuring at all.
However, accuracy/resolution of the laser DEVICE is not the determining factor in the overall measurement accuracy and precision, at least for non-professionals. (At least, that's my opinion as someone who teaches measurement protocols and theory to struggling undergraduates).
Also IMO, assuming the measurement device is calibrated properly, pool length measurements are going to tend to be biased long whether one uses tape or a laser. Which tends to give the benefit of doubt to the swimmer.
I forgot to mention that I am not sure how easy it is to use the new laser measuring devices.
Easy to use, ambient light does not interfere. Measurement is specified at 1 mm, bias at less than 1.5 mm on this model (if you can believe specs). This is better than the USMS requirement of 5 mm resolution.
www.amazon.com/.../B003Q6FGR2
Jeff demo'd this device for me yesterday, pretty slick.
The thing is, the trend is for devices to be getting easier to use and cheaper to purchase; quite a few LMSCs are purchasing one. So the USMS model of expecting more measurements to confirm bulkhead placement is perhaps getting more and more desirable over not measuring at all.
However, accuracy/resolution of the laser DEVICE is not the determining factor in the overall measurement accuracy and precision, at least for non-professionals. (At least, that's my opinion as someone who teaches measurement protocols and theory to struggling undergraduates).
Also IMO, assuming the measurement device is calibrated properly, pool length measurements are going to tend to be biased long whether one uses tape or a laser. Which tends to give the benefit of doubt to the swimmer.
