So again in 747 and 748 the recurve appears primarily as a highlight; is that correct?
An appendage at that point is considered to spoil the recurve or obstruction.
It must be free of any appendages abutting upon the outside of the recurve at a right angle.
The abutment is at right angles and therefore spoils the recurve.
If no second recurve is present, an obstruction at right angles to the inner line of flow is acceptable in lieu of it.
Placing the delta upon the recurve would spoil that recurve.
Since the delta would be located on the only recurve, this recurving ridge is eliminated from consideration.
These tented arches have two of the loop characteristics, recurve and delta, but lack the third, the ridge count.
To spoil the recurve of a whorl the appendage must be connected to the recurve at the point of contact with the line of flow.
This pattern has a recurve and a separate delta, but it still lacks the ridge count necessary to make it a loop.