Regal 53 SC Owner's Manual page 333

To use the chaise lounge portion of the sun pad, pull up
on the framework from a side position. Then pull the
adjuster-receiver arm to stern which will lock it at the de-
sired angle. Ensure that the arm is secured in the deck
track. See the illustration.
TYPICAL SUN PAD FRAMEWORK
Adjuster-Receiver Arm
Adjust Angle-Pull Up On Framework
SUNPAD FRAMEWORK-FRONT VIEW
Place Adjuster-Receiver
Arm In Track
SUN PAD FRAMEWORK-SIDE VIEW
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Chapter 7