Nortik scubi 1 XL Assembly Instructions Manual page 10

Then slide the seat bar back into the
fitting and secure it again with the pin.
Now the two identical cross ribs are
installed behind and in front of the seat.
Push the boat skin a bit aside and place
the cross rib in front of the seat
diagonally onto the clip on the keel rod.
(see picture on the left)
Then right it slowly up, while the clips
interlock.
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