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.
What they found was that if you stay awake for 17 hours, your hand-eye coordination would be about the same as if you drank enough alcohol to bring your blood alcohol concentration (BAC) level to 0.05%. At this BAC, it is illegal to drive a car in many areas, but people drive after being awake for 17 hours all the time!he 17 year old Randy Gardner broke the previous record of 260 hours for his high school science fair project. This was in 1965 and I havenât read or heard of anything like it since.