| Most Used Uplink Msg Elements - Jan00 to Jun09 | Msg# | Total | % Used |
| CLIMB TO AND MAINTAIN level | 20 | 643913 | 17.218 |
| REPORT REACHING level | 175 | 368665 | 9.858 |
| free text | 169 | 324862 | 8.687 |
| CONTACT unit frequency | 117 | 310551 | 8.304 |
| AT position CONTACT unit frequency | 118 | 271919 | 7.271 |
| REQUEST POSITION REPORT | 147 | 263056 | 7.034 |
| CLEARED TO DEVIATE UP TO distance direction OF ROUTE | 82 | 200327 | 5.357 |
| REPORT LEVEL level | 129 | 193091 | 5.163 |
| REPORT BACK ON ROUTE | 127 | 187877 | 5.024 |
| SQUAWK code | 123 | 136791 | 3.658 |
| AT position MONITOR unit frequency | 121 | 128962 | 3.448 |
| UNABLE | 0 | 116740 | 3.122 |
| DUE TO TRAFFIC | 166 | 87781 | 2.347 |
| STANDBY | 1 | 79661 | 2.130 |
| REQUEST DEFERRED | 2 | 50205 | 1.342 |
| MAINTAIN BLOCK level THROUGH level | 30 | 42618 | 1.140 |
| MONITOR unit frequency | 120 | 26920 | 0.720 |
| MAINTAIN level | 19 | 24700 | 0.660 |
| CLIMB TO REACH level BY time | 26 | 20313 | 0.543 |
| RESUME NORMAL SPEED | 116 | 17387 | 0.465 |
| AT time CONTACT unit frequency | 119 | 16252 | 0.435 |
| DESCEND TO AND MAINTAIN level | 23 | 15389 | 0.411 |
| WHEN READY | 164 | 15016 | 0.402 |
| CONFIRM SPEED | 134 | 13309 | 0.356 |
| PROCEED DIRECT TO position | 74 | 12810 | 0.343 |
| CLIMB TO REACH level BY position | 27 | 11714 | 0.313 |
| CRUISE CLIMB TO level | 34 | 10742 | 0.287 |
| WHEN CAN YOU ACCEPT level | 148 | 9947 | 0.266 |
| RADAR SERVICES TERMINATED | 154 | 9782 | 0.262 |
| MAINTAIN speed | 106 | 9618 | 0.257 |
| CONFIRM LEVEL | 133 | 8830 | 0.236 |
| WHEN ABLE PROCEED DIRECT TO position | 75 | 8075 | 0.216 |
| ROGER | 3 | 8068 | 0.216 |
| CONFIRM NEXT WAYPOINT ETA | 141 | 7923 | 0.212 |
| MAINTAIN speed OR GREATER | 108 | 7460 | 0.199 |
| MAINTAIN speed OR LESS | 109 | 6589 | 0.176 |
| CLIMB TO AND MAINTAIN BLOCK level TO level | 31 | 6484 | 0.173 |
| AT position PROCEED DIRECT TO position | 77 | 6386 | 0.171 |
| CROSS position AT AND MAINTAIN level | 49 | 6113 | 0.163 |
| CLEARED routeclearance | 80 | 3881 | 0.104 |
| CONFIRM ENSUING WAYPOINT | 142 | 2937 | 0.079 |
| AT PILOTS DISCRETION | 177 | 2722 | 0.073 |
| OFFSET distance direction OF ROUTE | 64 | 2688 | 0.072 |
| EXPECT CLIMB AT time | 7 | 2535 | 0.068 |
| AT position CLIMB TO AND MAINTAIN level | 22 | 1959 | 0.052 |
| CLEARED TO position VIA route clearance | 79 | 1819 | 0.049 |
| RADAR CONTACT LOST | 156 | 1780 | 0.048 |
| AFFIRM | 4 | 1776 | 0.047 |
| DESCEND TO REACH level BY position | 29 | 1754 | 0.047 |
| DESCEND TO REACH level BY time | 28 | 1693 | 0.045 |
| REPORT REACHING BLOCK level TO level | 180 | 1666 | 0.045 |
| DUE TO AIRSPACE RESTRICTION | 167 | 1501 | 0.040 |
| CONFIRM NEXT WAYPOINT | 140 | 1461 | 0.039 |
| CROSS position AT OR AFTER time | 53 | 1428 | 0.038 |
| EXPECT CLIMB AT position | 8 | 1348 | 0.036 |
| REPORT DISTANCE to from position | 181 | 1237 | 0.033 |
| CONFIRM ASSIGNED LEVEL | 135 | 1228 | 0.033 |
| CROSS position AT time | 51 | 1210 | 0.032 |
| CROSS position AT OR BEFORE time | 52 | 1205 | 0.032 |
| AT position CLEARED route clearance | 83 | 1097 | 0.029 |
| AT time CLIMB TO AND MAINTAIN level | 21 | 1083 | 0.029 |
| CONFIRM ASSIGNED ROUTE | 137 | 1003 | 0.027 |
| CAN YOU ACCEPT level AT time | 150 | 999 | 0.027 |
| REJOIN ROUTE BY time | 69 | 904 | 0.024 |
| NEGATIVE | 5 | 834 | 0.022 |
| DISREGARD | 168 | 807 | 0.022 |
| REJOIN ROUTE BY position | 68 | 802 | 0.021 |
| CAN YOU ACCEPT level AT position | 149 | 788 | 0.021 |
| REPORT LEAVING level | 128 | 670 | 0.018 |
| CONFIRM REPORTED WAYPOINT | 139 | 543 | 0.015 |
| AT time PROCEED DIRECT TO position | 76 | 539 | 0.014 |
| AT time MONITOR unit frequency | 122 | 447 | 0.012 |
| REPORT POSITION | 132 | 405 | 0.011 |
| CONFIRM REQUEST | 143 | 372 | 0.010 |
| CONFIRM TIME OVER REPORTED WAYPOINT | 138 | 354 | 0.009 |
| free text urgent | 170 | 260 | 0.007 |
| RADAR CONTACT position | 155 | 215 | 0.006 |
| AT time EXPECT CLIMB TO level | 13 | 214 | 0.006 |
| DESCEND TO AND MAINTAIN BLOCK level TO level | 32 | 186 | 0.005 |
| CHECK STUCK MICROPHONE | 157 | 177 | 0.005 |
| EXPECT level | 6 | 160 | 0.004 |
| AT time CROSS position AT AND MAINTAIN level | 62 | 145 | 0.004 |
| EXPECT TO CROSS position AT level | 42 | 133 | 0.004 |
| AT time DESCEND TO AND MAINTAIN level | 24 | 133 | 0.004 |
| AT position EXPECT CLIMB TO level | 14 | 113 | 0.003 |
| AT position OFFSET distance direction OF ROUTE | 65 | 108 | 0.003 |
| CROSS position AT level | 46 | 103 | 0.003 |
| EXPECT CRUISE CLIMB AT position | 12 | 98 | 0.003 |
| THEN | 165 | 90 | 0.002 |
| CRUISE level | 33 | 88 | 0.002 |
| ATIS atis code | 158 | 85 | 0.002 |
| AT time OFFSET distance direction OF ROUTE | 66 | 82 | 0.002 |
| EXPECT DESCENT AT time | 9 | 68 | 0.002 |
| REPORT REMAINING FUEL AND PERSONS ON BOARD | 131 | 67 | 0.002 |
| REDUCE SPEED TO speed | 113 | 66 | 0.002 |
| PROCEED BACK ON ROUTE | 67 | 65 | 0.002 |
| REPORT PASSING position | 130 | 58 | 0.002 |
| CLEARED procedure name | 81 | 57 | 0.002 |
| CONFIRM ASSIGNED SPEED | 136 | 55 | 0.001 |
| AT position DESCEND TO AND MAINTAIN level | 25 | 52 | 0.001 |
| CROSS position AT OR ABOVE level | 47 | 39 | 0.001 |
| WHEN CAN YOU ACCEPT speed | 151 | 38 | 0.001 |
| EXPEDITE CLIMB TO level | 36 | 37 | 0.001 |
| INCREASE SPEED TO speed | 111 | 35 | 0.001 |
| CROSS position AT OR BELOW level | 48 | 33 | 0.001 |
| AT position EXPECT speed | 101 | 29 | 0.001 |
| EXPECT FURTHER CLEARANCE AT time | 93 | 23 | 0.001 |
| REDUCE SPEED TO speed OR LESS | 114 | 22 | 0.001 |
| CONFIRM SQUAWK | 144 | 20 | 0.001 |
| TURN direction HEADING degrees | 94 | 19 | 0.001 |
| EXPECT BACK ON ROUTE BY time | 71 | 18 | 0.000 |
| ALTIMETER altimeter | 153 | 16 | 0.000 |
| MAINTAIN OWN SEPARATION AND VMC | 176 | 15 | 0.000 |
| INCREASE SPEED TO speed OR GREATER | 112 | 15 | 0.000 |
| MAINTAIN PRESENT SPEED | 107 | 14 | 0.000 |
| AT time EXPECT DESCENT TO level | 15 | 14 | 0.000 |
| SQUAWK IDENT | 179 | 14 | 0.000 |
| WHEN CAN YOU ACCEPT distance offset direction OFFSET | 152 | 13 | 0.000 |
| AT position EXPECT DIRECT TO position | 88 | 13 | 0.000 |
| EXPECT DESCENT AT position | 10 | 12 | 0.000 |
| CROSS position BETWEEN level AND level | 50 | 10 | 0.000 |
| EXPECT BACK ON ROUTE BY position | 70 | 10 | 0.000 |
| CROSS position AT OR AFTER time AT level | 60 | 9 | 0.000 |
| REPORT HEADING | 145 | 9 | 0.000 |
| AT position EXPECT DESCENT TO level | 16 | 9 | 0.000 |
| EXPECT procedure name | 99 | 8 | 0.000 |
| EXPECT CRUISE CLIMB AT time | 11 | 8 | 0.000 |
| AT level PROCEED DIRECT TO position | 78 | 8 | 0.000 |
| MAINTAIN speed TO speed | 110 | 8 | 0.000 |
| HOLD AT position MAINTAIN level INBOUND TRACK deg dir | 91 | 7 | 0.000 |
| RESUME OWN NAVIGATION | 72 | 7 | 0.000 |
| CROSS position AT OR BEFORE time AT level | 59 | 6 | 0.000 |
| EXPECT DIRECT TO position | 87 | 6 | 0.000 |
| AT time EXPECT speed | 100 | 6 | 0.000 |
| AT time EXPECT DIRECT TO position | 89 | 5 | 0.000 |
| AT time EXPECT CRUISE CLIMB TO level | 17 | 4 | 0.000 |
| AT position EXPECT CRUISE CLIMB TO level | 18 | 4 | 0.000 |
| DO NOT EXCEED speed | 115 | 4 | 0.000 |
| IMMEDIATELY STOP CLIMB AT level | 40 | 4 | 0.000 |
| EXPECT route clearance | 85 | 4 | 0.000 |
| CONTINUE PRESENT HEADING | 96 | 4 | 0.000 |
| IMMEDIATELY CLIMB TO level | 38 | 4 | 0.000 |
| AT position FLY HEADING degrees | 97 | 3 | 0.000 |
| SQUAWK MODE CHARLIE | 125 | 3 | 0.000 |
| CROSS position AT OR LESS THAN speed | 56 | 3 | 0.000 |
| CRUISE CLIMB ABOVE level | 35 | 2 | 0.000 |
| AT position EXPECT route clearance | 86 | 2 | 0.000 |
| AT level EXPECT speed | 102 | 2 | 0.000 |
| CROSS position AT time AT level | 58 | 2 | 0.000 |
| STOP SQUAWK MODE CHARLIE | 126 | 2 | 0.000 |
| CROSS position BETWEEN time AND time | 54 | 2 | 0.000 |
| IMMEDIATELY DESCEND TO level | 39 | 2 | 0.000 |
| CROSS position AT OR GREATER THAN speed | 57 | 2 | 0.000 |
| EXPEDITE DESCENT TO level | 37 | 1 | 0.000 |
| IMMEDIATELY STOP DESCENT AT level | 41 | 1 | 0.000 |
| AT position CLEARED procedure name | 84 | 1 | 0.000 |
| AT level EXPECT DIRECT TO position | 90 | 1 | 0.000 |
| STOP SQUAWK | 124 | 1 | 0.000 |
| DESCEND AT vertical rate MINIMUM | 173 | 1 | 0.000 |
| CROSS position AT speed | 55 | 1 | 0.000 |
| REPORT GROUND TRACK | 146 | 1 | 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 | 3739811 | 100.000 |