I use EsaSky (among others) to prepare ground-based observations. At Phase II you can provided a finding chart for the resident astronomer to use. The usually ask for the N and E direction and the scale.
The scale could be ala Google maps in with you represent 1 arcdeg, 1 arcmin, 1 arcsec depending on the scale you have selected.
N and E directions should be particularly useful if a previous ticket, regarding FoV rotation and inversion is implemented.
The capability of generating a finding chart without menus, etc would be also extremely useful.
Customer support service by UserEcho