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

lake elicited the information that the MILWAUKEE CLIPPER had
seen the drogues; from her directions we were able to recover
them. Positions were by radar fix.
Drogues II (surface) and IV (125 feet) were set at
43~03.3', 86~41.8', 22.3 miles west of Grand Haven at 0825
on 24 June. On 25 June the two, still together, were recovered at 2040 at 43007.9', 86~41.2? 18 miles 252~ true from
Muskegon. There was no separation of these drogues during
their 36 hours 15 minutes adrift. They had travelled an
apparent 5.4 miles, giving an indicated current speed at
both depths of 0.15 mph.
The wind regime for this run was:
24 June SSE 4-8 knots
25 June SE 6-8 k (going calm in afternoon)
Drogue run, 27-28 October 1963 ^ at USPHS Buoy20 and
Weather Tower (Fig. 14)g On 27 October surface drogue I was
set alongside the USWB-USLS-USPHS-UM weather tower off Mona
Lake inlet at 0934. Deep drogue II (130 feet) and surface
drogue III were set beside USPHS Buoy 20 at 10-5-9 and 1104
respectively. Recovery positions of II and III were by timed
run to Buoy 20; positioning of I was by sextant fix.
Drogue II was recovered at 1350 after moving 0.34 mile
toward 0980 true-an indicated speed of 0.12 mph. Drogue III
was retrieved at 1355 after moving 0.58 mile toward 074~ true
at an indicated speed of 0.20 mph.
Drogue I was positioned at 1640 at a point 1.6 miles 1640
true from the tower, having moved at an indicated speed of
0.23 mph. This drogue was left adrift overnight and was

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