| Most Used Uplink Msg Elements - Jan09 to Dec09 | Msg# | Total | % Used |
| CONTACT unit frequency | 117 | 47379 | 14.104 |
| AT position CONTACT unit frequency | 118 | 38590 | 11.488 |
| REQUEST POSITION REPORT | 147 | 35061 | 10.437 |
| CLIMB TO AND MAINTAIN level | 20 | 32548 | 9.689 |
| free text | 169 | 30156 | 8.977 |
| SQUAWK code | 123 | 20158 | 6.001 |
| CLEARED TO DEVIATE UP TO distance direction OF ROUTE | 82 | 19631 | 5.844 |
| AT position MONITOR unit frequency | 121 | 19271 | 5.737 |
| REPORT BACK ON ROUTE | 127 | 17879 | 5.322 |
| STANDBY | 1 | 13115 | 3.904 |
| REPORT LEVEL level | 129 | 8193 | 2.439 |
| MAINTAIN BLOCK level TO level | 30 | 7474 | 2.225 |
| MONITOR unit frequency | 120 | 5449 | 1.622 |
| UNABLE | 0 | 5360 | 1.596 |
| DUE TO TRAFFIC | 166 | 4327 | 1.288 |
| PROCEED DIRECT TO position | 74 | 3594 | 1.070 |
| RADAR SERVICES TERMINATED | 154 | 2528 | 0.753 |
| MAINTAIN level | 19 | 2449 | 0.729 |
| WHEN READY | 164 | 2255 | 0.671 |
| AT position PROCEED DIRECT TO position | 77 | 2072 | 0.617 |
| CLIMB TO REACH level BY time | 26 | 1904 | 0.567 |
| WHEN CAN YOU ACCEPT level | 148 | 1668 | 0.497 |
| WHEN ABLE PROCEED DIRECT TO position | 75 | 1612 | 0.480 |
| CLIMB TO REACH level BY position | 27 | 1598 | 0.476 |
| CONFIRM SPEED | 134 | 1549 | 0.461 |
| RESUME NORMAL SPEED | 116 | 1306 | 0.389 |
| DESCEND TO AND MAINTAIN level | 23 | 1005 | 0.299 |
| REQUEST DEFERRED | 2 | 983 | 0.293 |
| CLIMB TO AND MAINTAIN BLOCK level TO level | 31 | 465 | 0.138 |
| MAINTAIN speed | 106 | 451 | 0.134 |
| DUE TO AIRSPACE RESTRICTION | 167 | 440 | 0.131 |
| MAINTAIN speed OR GREATER | 108 | 393 | 0.117 |
| CLEARED TO position VIA route clearance | 79 | 386 | 0.115 |
| AT time CONTACT unit frequency | 119 | 364 | 0.108 |
| CONFIRM NEXT WAYPOINT ETA | 141 | 358 | 0.107 |
| MAINTAIN speed OR LESS | 109 | 341 | 0.102 |
| EXPECT CLIMB AT time | 7 | 305 | 0.091 |
| CROSS position AT time | 51 | 303 | 0.090 |
| CAN YOU ACCEPT level AT position | 149 | 276 | 0.082 |
| ROGER | 3 | 232 | 0.069 |
| AT position CLEARED route clearance | 83 | 220 | 0.065 |
| CAN YOU ACCEPT level AT time | 150 | 196 | 0.058 |
| REPORT REACHING BLOCK level TO level | 180 | 182 | 0.054 |
| DESCEND TO REACH level BY time | 28 | 149 | 0.044 |
| RADAR CONTACT LOST | 156 | 146 | 0.043 |
| DESCEND TO REACH level BY position | 29 | 140 | 0.042 |
| DISREGARD | 168 | 113 | 0.034 |
| AT position CLIMB TO AND MAINTAIN level | 22 | 105 | 0.031 |
| CLEARED routeclearance | 80 | 102 | 0.030 |
| CROSS position AT OR AFTER time | 53 | 102 | 0.030 |
| CONFIRM ASSIGNED ROUTE | 137 | 100 | 0.030 |
| REPORT DISTANCE to from position | 181 | 88 | 0.026 |
| CROSS position AT OR BEFORE time | 52 | 78 | 0.023 |
| REJOIN ROUTE BY position | 68 | 63 | 0.019 |
| EXPECT CLIMB AT position | 8 | 61 | 0.018 |
| EXPECT TO CROSS position AT level | 42 | 60 | 0.018 |
| AT time CLIMB TO AND MAINTAIN level | 21 | 58 | 0.017 |
| AT time MONITOR unit frequency | 122 | 58 | 0.017 |
| AT time PROCEED DIRECT TO position | 76 | 58 | 0.017 |
| CONFIRM ASSIGNED LEVEL | 135 | 52 | 0.015 |
| AT time DESCEND TO AND MAINTAIN level | 24 | 40 | 0.012 |
| CHECK STUCK MICROPHONE | 157 | 34 | 0.010 |
| AFFIRM | 4 | 31 | 0.009 |
| free text urgent | 170 | 27 | 0.008 |
| REPORT LEAVING level | 128 | 24 | 0.007 |
| AT time EXPECT CLIMB TO level | 13 | 16 | 0.005 |
| CONFIRM REQUEST | 143 | 14 | 0.004 |
| CONFIRM LEVEL | 133 | 13 | 0.004 |
| OFFSET distance direction OF ROUTE | 64 | 12 | 0.004 |
| DESCEND TO AND MAINTAIN BLOCK level TO level | 32 | 11 | 0.003 |
| REJOIN ROUTE BY time | 69 | 11 | 0.003 |
| CONFIRM NEXT WAYPOINT | 140 | 11 | 0.003 |
| NEGATIVE | 5 | 10 | 0.003 |
| EXPECT level | 6 | 10 | 0.003 |
| CROSS position AT speed | 55 | 10 | 0.003 |
| RADAR CONTACT position | 155 | 8 | 0.002 |
| MAINTAIN speed TO speed | 110 | 7 | 0.002 |
| REPORT REACHING level | 175 | 6 | 0.002 |
| WHEN CAN YOU ACCEPT speed | 151 | 6 | 0.002 |
| CONFIRM ENSUING WAYPOINT | 142 | 5 | 0.001 |
| INCREASE SPEED TO speed | 111 | 5 | 0.001 |
| AT position EXPECT speed | 101 | 5 | 0.001 |
| REDUCE SPEED TO speed | 113 | 4 | 0.001 |
| CONFIRM ASSIGNED SPEED | 136 | 4 | 0.001 |
| AT PILOTS DISCRETION | 177 | 3 | 0.001 |
| CLEARED procedure name | 81 | 3 | 0.001 |
| AT position DESCEND TO AND MAINTAIN level | 25 | 3 | 0.001 |
| PROCEED BACK ON ROUTE | 67 | 3 | 0.001 |
| AT position EXPECT CLIMB TO level | 14 | 2 | 0.001 |
| AT position OFFSET distance direction OF ROUTE | 65 | 2 | 0.001 |
| SQUAWK IDENT | 179 | 2 | 0.001 |
| DO NOT EXCEED speed | 115 | 2 | 0.001 |
| AT position CLEARED procedure name | 84 | 2 | 0.001 |
| CROSS position AT level | 46 | 1 | 0.000 |
| EXPECT DESCENT AT time | 9 | 1 | 0.000 |
| CONFIRM SQUAWK | 144 | 1 | 0.000 |
| AT position EXPECT DIRECT TO position | 88 | 1 | 0.000 |
| EXPECT DESCENT AT position | 10 | 1 | 0.000 |
| EXPECT CRUISE CLIMB AT time | 11 | 1 | 0.000 |
| AT level PROCEED DIRECT TO position | 78 | 1 | 0.000 |
| INCREASE SPEED TO speed OR GREATER | 112 | 1 | 0.000 |
| AT time EXPECT CRUISE CLIMB TO level | 17 | 1 | 0.000 |
| EXPEDITE CLIMB TO level | 36 | 1 | 0.000 |
| AT time EXPECT DIRECT TO position | 89 | 1 | 0.000 |
| EXPECT CRUISE CLIMB AT position | 12 | 1 | 0.000 |
| CRUISE CLIMB TO level | 34 | 0 | 0.000 |
| ATIS atis code | 158 | 0 | 0.000 |
| REPORT POSITION | 132 | 0 | 0.000 |
| CROSS position AT AND MAINTAIN level | 49 | 0 | 0.000 |
| AT time CROSS position AT AND MAINTAIN level | 62 | 0 | 0.000 |
| ALTIMETER altimeter | 153 | 0 | 0.000 |
| REPORT PASSING position | 130 | 0 | 0.000 |
| MAINTAIN PRESENT SPEED | 107 | 0 | 0.000 |
| REDUCE SPEED TO speed OR LESS | 114 | 0 | 0.000 |
| AT time EXPECT DESCENT TO level | 15 | 0 | 0.000 |
| TURN direction HEADING degrees | 94 | 0 | 0.000 |
| AT position EXPECT DESCENT TO level | 16 | 0 | 0.000 |
| EXPECT procedure name | 99 | 0 | 0.000 |
| HOLD AT position MAINTAIN level INBOUND TRACK deg dir | 91 | 0 | 0.000 |
| REPORT HEADING | 145 | 0 | 0.000 |
| EXPECT DIRECT TO position | 87 | 0 | 0.000 |
| AT time EXPECT speed | 100 | 0 | 0.000 |
| AT position EXPECT CRUISE CLIMB TO level | 18 | 0 | 0.000 |
| EXPECT route clearance | 85 | 0 | 0.000 |
| CONTINUE PRESENT HEADING | 96 | 0 | 0.000 |
| CROSS position AT OR ABOVE level | 47 | 0 | 0.000 |
| EXPECT BACK ON ROUTE BY position | 70 | 0 | 0.000 |
| IMMEDIATELY CLIMB TO level | 38 | 0 | 0.000 |
| AT position FLY HEADING degrees | 97 | 0 | 0.000 |
| CROSS position AT OR LESS THAN speed | 56 | 0 | 0.000 |
| REPORT REMAINING FUEL AND PERSONS ON BOARD | 131 | 0 | 0.000 |
| CONFIRM TIME OVER REPORTED WAYPOINT | 138 | 0 | 0.000 |
| EXPECT FURTHER CLEARANCE AT time | 93 | 0 | 0.000 |
| MAINTAIN OWN SEPARATION AND VMC | 176 | 0 | 0.000 |
| WHEN CAN YOU ACCEPT distance offset direction OFFSET | 152 | 0 | 0.000 |
| RESUME OWN NAVIGATION | 72 | 0 | 0.000 |
| SQUAWK MODE CHARLIE | 125 | 0 | 0.000 |
| AT position EXPECT route clearance | 86 | 0 | 0.000 |
| STOP SQUAWK MODE CHARLIE | 126 | 0 | 0.000 |
| CROSS position BETWEEN time AND time | 54 | 0 | 0.000 |
| IMMEDIATELY DESCEND TO level | 39 | 0 | 0.000 |
| CROSS position AT OR GREATER THAN speed | 57 | 0 | 0.000 |
| CROSS position AT OR BEFORE time AT level | 59 | 0 | 0.000 |
| CRUISE CLIMB ABOVE level | 35 | 0 | 0.000 |
| THEN | 165 | 0 | 0.000 |
| AT time OFFSET distance direction OF ROUTE | 66 | 0 | 0.000 |
| CROSS position BETWEEN level AND level | 50 | 0 | 0.000 |
| CROSS position AT OR AFTER time AT level | 60 | 0 | 0.000 |
| IMMEDIATELY STOP CLIMB AT level | 40 | 0 | 0.000 |
| AT level EXPECT speed | 102 | 0 | 0.000 |
| CROSS position AT time AT level | 58 | 0 | 0.000 |
| EXPEDITE DESCENT TO level | 37 | 0 | 0.000 |
| STOP SQUAWK | 124 | 0 | 0.000 |
| DESCEND AT vertical rate MINIMUM | 173 | 0 | 0.000 |
| REPORT GROUND TRACK | 146 | 0 | 0.000 |
| CONFIRM REPORTED WAYPOINT | 139 | 0 | 0.000 |
| CROSS position AT OR BELOW level | 48 | 0 | 0.000 |
| EXPECT BACK ON ROUTE BY time | 71 | 0 | 0.000 |
| IMMEDIATELY STOP DESCENT AT level | 41 | 0 | 0.000 |
| AT level EXPECT DIRECT TO position | 90 | 0 | 0.000 |
| EXPECT TO CROSS position AT OR ABOVE level | 43 | 0 | 0.000 |
| EXPECT TO CROSS position AT OR BELOW level | 44 | 0 | 0.000 |
| EXPECT TO CROSS position AT AND MAINTAIN level | 45 | 0 | 0.000 |
| CROSS position AT AND MAINTAIN level AT speed | 61 | 0 | 0.000 |
| AT time CROSS position AT AND MAINTAIN level AT speed | 63 | 0 | 0.000 |
| HOLD AT position AS PUBLISHED MAINTAIN level | 92 | 0 | 0.000 |
| TURN direction GROUND TRACK degrees | 95 | 0 | 0.000 |
| IMMEDIATELY TURN direction HEADING degrees | 98 | 0 | 0.000 |
| AT time EXPECT speed TO speed | 103 | 0 | 0.000 |
| AT position EXPECT speed TO speed | 104 | 0 | 0.000 |
| AT level EXPECT speed TO speed | 105 | 0 | 0.000 |
| CLIMB AT vertical rate MINIMUM | 171 | 0 | 0.000 |
| CLIMB AT vertical rate MAXIMUM | 172 | 0 | 0.000 |
| DESCEND AT vertical rate MAXIMUM | 174 | 0 | 0.000 |
| CONFIRM ATIS CODE | 182 | 0 | 0.000 |
| Totals | Totals | 335917 | 100.000 |