10 0 RESERVED 21 1 INSTANTANEOUS 32 2 AVERAGED OVER 3 MINUTES OR LESS 43 3 AVERAGED OVER MORE THAN 3 MINUTES, BUT 6 AT THE MOST 54 4 AVERAGED OVER MORE THAN 6 MINUTES, BUT 12 AT THE MOST 65 5 INSTANTANEOUS 76 6 AVERAGED OVER 3 MINUTES OR LESS 87 7 AVERAGED OVER MORE THAN 3 MINUTES, BUT 6 AT THE MOST 98 8 AVERAGED OVER MORE THAN 6 MINUTES, BUT 12 AT THE MOST 109 9 VECTOR OR DOPPLER CURRENT PROFILLING METHOD NOT USED 1110 10 RESERVED 1211 11 1 HOUR OR LESS 1312 12 MORE THAN 1 HOUR BUT 2 AT THE MOST 1413 13 MORE THAN 2 HOUR BUT 4 AT THE MOST 1514 14 MORE THAN 4 HOUR BUT 8 AT THE MOST 1615 15 MORE THAN 8 HOUR BUT 12 AT THE MOST 1716 16 MORE THAN 12 HOUR BUT 18 AT THE MOST 1817 17 MORE THAN 18 HOUR BUT 24 AT THE MOST 1918 18 RESERVED 2019 19 DRIFT METHOD NOT USED 2131 31 MISSING 22