Lake 16, Martin, Allegan County, Michigan. The ice thickness today was 6″ clear, 2″ frosted, 2″ of slush heavy on the water. Air temperature at start of day was 33F and 28F three hours later with a freshening breeze. Water temperature 36-38F depending on whose gauge you thought was most correct. You could visually track the diver as he went down until he went below 25 feet. Bottom depth at this spot was ~42 feet. Last diver down had a lateral visibility of ~20 feet after your eyes adjusted to the darkness with no lights being used. Only a partial wagon wheel & spokes could be shoveled out due to the wind having made snow less spots around the area. Only one ice fisherman on the lake with us and he was having no luck at all.