Graco Nautilus 1753283 - Manual (Page 57)

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This restraint is certified for use in Motor Vehicles.
It is certified for use in Aircraft ONLY when used with the built-in harness.
When used as a booster WITHOUT the harness, this restraint is NOT CERTIFIED for aircraft use
because aircraft seats do not have a shoulder belt.
Important points to remember:
1. Airlines have some restrictions about the use of child restraints.
2. Install your car seat on an airplane in the same way it is installed in an automobile with a lap
belt (see Section 10.1, Using Child Restraint WITH Built-in harness, pp. 32-33).
3. Check that the airplane seat belt holds the child restraint securely in place at all times.
19.0 Airplane Use