This is a standand 40up tipup which I use that are made in Westfield, Massachuesetts
A flag is up... means a fish is eating the bait. People yell either "FLAG" or "TIPUP"....we usually set 5 to 8 tipups per person so it can get crazy busy when the "BITE IS ON"
feel for the fish and set the hook (jerk the line)
hand over hand play the fish up through the hole
and catch the fish which in this case is a small Northern Pike