Wrap card

The observe file format manual states, '...use CW wrap if two azimuths (differing by 360) are possible'

Caveat:

The diagram below illustrates a situation at odds with the 
above statement

Over the top (O-T-T)

A little-used feature of the wrap card is enabling of the 'over-the-top' function.

VLA antennas are designed to operate past zenith, within the limits of the elevation drive gear, to an additional 32 degrees. This can be useful when a source's associated calibrator would necessitate an 'unwrap' to be reached, but it still at an elevation of > 58 degrees.

Example:

(discussion of OTT enabling with respect to card format here)