SAFEDOCK®
Safegate Group
Manual
Date: 6 February 2015
Chapter: 3 OPERATION
Version: 2.7
Page 6 of 22
2.2
THE DOCKING PROCEDURE IN ABNORMAL CONDITIONS
If an object is blocking the view from the Safedock laser scanning unit toward the
stop-position of the selected aircraft type, the system will be unable to perform the
docking procedure. When an object is detected between the laser scanning unit and
the stop-position, the system will halt the docking procedure and display a
GATE
BLOCK
warning and a
WAIT
message. When the blocking object is removed, the
docking procedure will be resumed.
When objects are detected close to the Safedock system and its laser window the
system will halt the docking procedure and display a
VIEW BLOCK
warning and
WAIT
message. When the disturbing objects are removed, for example by cleaning
the laser window, or when the aircraft is found approaching, the docking procedure
will be resumed.
If an unrecoverable error occurs during a docking procedure, a
SBU
(Safety Back Up)
condition exists. In this case an alternate method to guide aircraft to the stop-position
must be used, as the docking procedure cannot be completed. SBU stop conditions
are:
1. A hardware failure
2. Aircraft far off the centreline and less than 2m to the stop-position.
3. View from laser scanning unit to aircraft blocked with less than 2m to the stop-
position.
FIGURE 3.1
– CRITICAL ZONES
(Option)
Note:
The SBU event can occur after the pilot has got the
STOP
message, but the
aircraft is still rolling. In this case a manual
Park On
command must be done in order
to complete the docking sequence with a
Blocks On
message to Superior System
and external systems.
+2,5 m or 8 ft
SAFEDOCK
Far Clip distance
Stop
+15 m or
49 ft
Stop
+2 m or
6.5 ft
Zone
‘View
Blocked’
Zone
‘Gate
Blocked’
Zone
‘ID Fail’
Zone
‘Capture &
docking’
S
B
U
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