dm. Designated Marksman. military marksman role in a U.S. infantry squad. The DM's role is to supply rapid accurate fire on enemy targets at ranges up to 870 yds with a highly-accurate semi-automatic rifle equipped with a telescopic sight.he DM's role is to supply rapid accurate fire on enemy targets at ranges up to 870 yds with a highly-accurate semi-automatic rifle equipped with a telescopic sight.
The average person is awake for about 14 to 16 hours per day. Most could extend that to about 20 hours if they were to stay up later; up to 40 hours is easy once a person gets beyond the 24 hour mark; longer than 60 hours (staying awake straight through two nights and three days) is rare, but doable; the record is 264 hours or 11 days straight. Hannah Griffiths.
How about doing it 11 days in a row? A man in Cornwall, England, actually went 11 consecutive days without a wink of sleep. On May 24, 2007, Tony Wright, a 42-year-old horticulturalist, claimed to have beaten the record of 264 hours (exactly 11 days) set in 1964 by 17-year-old American Randy Gardner. Wright had some practice: he had already been through more than 100 sleep deprivation experiments, the longest one lasting eight days. He also employed a unique raw-food diet. Wright claims that his regimen of salads, avocados, bananas, pineapples, nuts, seeds, carrot juice and herbal tea helped his brain stay awake.