The teletype addressee and originator part of the LS/LM form are historic - There are some shaded boxes that show the contents of the Loadmessage (LDM) in the standard format.
This means that the loadsheet copy could be handed over to a telex operator to send the load message with data to the online stations without being a trained loadsheet agent. It is also useful if you do not have a preset LDM "masK" on your system. LDM needs to be sent in the standard format as this can be read by automated systems.
I remember telex operators from my early days before we had computer terminals. The telex machine we had in our load control office was difficult to say the least the characters did not type immediately on the machine there was a 2 character lag (eg type LHR and as you type the R the L appears!!) High level of concentration required if you were not a touch typist.
Whilst completing the loadsheet took me 5-10 minutes - sending the message could take 15-20 minutes
