• The readout bounds in the internal headers ORAC_X_LOWER_BOUND, ORAC_Y_LOWER_BOUND, ORAC_X_UPPER_BOUND, ORAC_Y_UPPER_BOUND define the pixel limits for processing, i.e. there are no bias strips and interpolation direction.

• Error processing is disabled so the readout noise and analogue-to-digital conversions are not specified.

• There is no deferred charge.

• Position list processing tasks expect to find the names of lists stored within NDFs.

• Logging is to the terminal.

• The data type of NDF arrays is preserved.

• Does not detect saturated pixels.

• Parameters are neither saved from or to a ‘restoration’ file.

The script also performs the following tasks.

• Calls the steering primitive to set steering headers.

• This primitive is suitable for imaging instruments.