Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p138
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 138/225)
Character Range: 669401–672470

operating conditions, the time taken from determination, to display, of the lateral displacement by the A-VDGS must not result in the aircraft deviating from the aircraft parking position centreline by more than 1 m.

       (4) The following information displayed by an A-VDGS:

(a) displacement of the aircraft relative to the stand centreline;

(b) distance to the stopping position;

        must have the accuracy specified in Table 9.124 (4) so that for the guidance information mentioned in a row of column 1 of the Table, the maximum deviation at the stop position or at a specified distance from the stop position is that given in the same row in column 2, 3, 4 or 5, as the case requires.

    Table 9.124 (4)   A-VDGS displacement accuracy
Guidance information  Maximum deviation at stop position (stop area)   Maximum deviation at    Maximum deviation at     Maximum deviation at

                                                                       9 m from stop position  15 m from stop position  25 m from stop position
Azimuth               ±0.25 m                                          ±0.34 m                 ±0.4 m                   ±0.5 m
Distance              ±0.5 m                                           ±1.0 m                  ±1.3 m                   N/A

       (5) If an A-VDGS uses symbols and graphics to depict guidance information, the symbols and graphics must be representative of the type of information depicted.
Note   The use of colour should be appropriate and follow signal convention, i.e. red, yellow and green mean hazard, caution and normal/correct conditions, respectively. CASA recommends that the effects of colour contrasts should also be considered.

       (6) An A-VDGS must provide information on the lateral displacement of an aircraft relative to the stand centreline at least 25 m before the stop position.
Note   The indication of the distance of the aircraft from the stop position may be colour-coded and presented at a rate and distance proportional to the actual closure rate and distance of the aircraft approaching the stop point.

       (7) An A-VDGS must provide continuous closure distance and closure rate from at least 15 m before the stop position.

       (8) For subsection (7), closure distance displayed in numerals must be:

(a) in metre integers to the stop position; and

(b) to 1 decimal place at least 3 m before the stop position.

       (9) An A-VDGS must have the ability, at any time during a docking manoeuvre, to indicate that the aircraft must be immediately stopped, by:

(a) displaying the word STOP in red characters; and

(b) not displaying any other information.

Note   Reasons for indication of an immediate halt include, for example, a failure of the A-VDGS.
       (10) An A-VDGS must allow any person responsible for the operational safety of the aircraft parking position to initiate an immediate stop to a docking procedure if required in the interests of safety.

9.125 Aircraft parking position manoeuvring guidance lights

       (1) Aircraft parking position