Attribute: Vertical clearance, open
Attribute type: F
The vertical clearance of an object in opened condition (e.g. an opened lifting bridge) measured from the plane towards the object overhead.
# Must be encoded for BRIDGE objects over navigable water that are opening, with limited clearance when open.
INT 1: ID 23.3;
M-4: 380; 380.2; 381.3;
Minimum Value: 0
Unit: defined in the HUNI subfield of the DSPM record or in the HUNITS attribute of the M_UNIT meta object class, e.g. metre (m)
Resolution: 0.1 m or 0.1 ft
17.8 for a vertical clearance of 17.8 metres.