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Operating the mini-Secchi disk. (a) Lanyard is slipped over the wrist and (b) weight pushed out from the bobbin. (c) Disk detached and (d) holding hand fingers slipped under the finger strap. (e) Handle is detached from the casing and flipped 180 degrees. (f) Handle is used to wind the tape measure in and out of the main body of the mini-Secchi disk.
