Studies on water movements and sediments in Southern Lake Michigan : part 1[-3] ... / by John C. Ayers.

fish-net-buoy style. In this float the flotation is furnished
by a series of ovo-cylindrical floats of five inches diameter.
These floats are strung on the float staff until the current
drag is carried but only the upper end of the uppermost plastic
float extends through the water surface. The exposed portion
of the uppermost float, a portion of the staff six feet long
by 5/8 inch wide, and a 3/8 inch mesh wire radar corner reflector one foot in each dimension are the total of surfaces
exposed to wind. Total windage exposure is 200 square inches,
which is countered by an underwater exposure of 32 square feet.
The new float eliminates 70 square inches of exposure to wind
in comparison to the old-style float that is described under
"Tests of Windage Effects on Drogues."
On 9 November a line of nine surface drogues was set as
the ship approached Chicago from the east side of the lake.
Drogues were set at about 2-mile intervals along a course
running about 250~ true from about 17 miles outside Four Mile
Crib to a half mile inside the crib. All release positions
involved in this run were radar fixes.
Drogue X is believed to have sunk; we find no record that
it had been checked for adequacy of flotation against its current drag, and it disappeared from radar contact before the
ship arrived at the position for setting drogue IX.
Drogue VI parted from its current drag (hit- by steamer?).
The float was found by the police of New Buffalo, Michigan,
on the beach there on the morning of 2 December.
The seven drogues recovered had all moved various distances
northward and their movements had various degrees of eastward

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