Thank you for the replies. I realise that additional information such as "crossing" etc is also added.
My main query was the insistance, or otherwise, of Unit bosses insisting that TI on unknowns was only given as per MATS Pt1. I prefer being given a 'target' level to look out for rather than a generic 'above' or 'below', so I'm pleased to hear the latter is not mandatory.
Any other units got an opinion?
Tori