Need some remote assistance to do that from down here in Rocky.
I want to look at the real/actual effect underwater of visibility in varying degrees of "murkiness" (turbidity). I've done a lot on the research side of things already but want refine that practically.
To do that I'm looking for somebody who gets around in rivers/creeks of varying water quality that the average person fishes in. More than one if others interested. Can easily be done when on any fishing trip.
Need to have a Secchi Disc (I'm sure everybody has one

Idea is to measure the turbidity with the Secchi Disc and then lower a Gro-Pro down into the water to see what the underwater view is at that depth. Much more practical and realistic.
Making a Secchi Disc is as easy as p..s. Show interested party how to do it. A metal disc about 150mm (6 inch) diam painted on upper side in black and white quadrants and lower horizontally into water by a string/thin rope with measuring marks on it. Note the string depth when the disc disappears. That's all there is to it.
Learn a bit more about barra fishing as we go. More than happy to share results and acknowledge assistance.
Volunteers on here or by PM if you want to take part, please.
Last time FFF did a project we ended up with the Darwin Ch21 VHF marine repeater with 2Rods doing an enormous amount of work at the Darwin end.