VAN EFFEN FLD
ROCK, MI
6Y4 (Van Effen Field) in Rock, Michigan, is a privately owned, non-towered airport with one runway, 12/30, measuring 2,600 by 100 feet of turf.
No instrument approaches are published and operations are visual-only. Pilots coordinate on the common traffic advisory frequency, 122.9 MHz.
Field elevation is 970 feet above mean sea level.