Britax safe-n-sound BS0072E-i20133 Instructions For Installation & Use page 22

REARWARD FACING
Newborn (Rearward Facing)
Marker A
Rear facing mode is suitable for shoulders
below the Lower Height Marker (A)
FORWARD FACING
Child Use (Forward Facing)
Marker C
Marker B
Forward-facing mode is suitable for shoulders
above shoulder height marker B but not below
marker A.
A loose restraint or harness is dangerous. Always remove slack from all webbing straps.
22
Instructions for Installation & Use
(Suitable up to 30mths approx)
(Suitable from 12mths to 4 yrs approx)
Older Child (Rearward Facing)
Marker B
While below marker B, remain rearward
facing. Convert to forward facing when
shoulder height Marker (B) is reached.
Discontinue Use (Forward Facing)
Marker C
Marker B
Move to the next form of child restraint when
the child's shoulders reach the upper shoulder
height marker C.