Here is US Sailing's Guide for Remote Hearings 

TLDR. 

I've recently done a couple of hearings using Teams/Zoom.

Some quick thoughts.

Virtual hearings are necessarily less good than face to face hearings.  They are more impersonal, and may impose barriers on some participants.

Virtual hearings are quite good for considering application of rules and interpretation of documents, where facts are largely not in issue and there are few witnesses.  They may be less good for boat v boat protests with numerous witnesses who may  be difficult to control electronically.

Virtual participation of one or more judges, in a hearing with parties and witnesses present in a physical hearing room with one or more judges isn't too problematic.

If parties are remote, there may be an inequitable advantage to a party who is technologically adept vis a vis one who is 'technologically challenged'.

So, first and foremost consider whether a protest is suitable for a virtual hearing.  I suggest that  we shouldn't allow it to become the norm.

Practically:

John A re: "Witnesses are normally only allowed in the meeting while giving evidence, but in this hearing, if they wish, they may remain as Observers."

John, I know that "remain" implies the fact that witnesses are not observers until after they have given evidence, but you might consider making that clearer in that sentence. 

Maybe along the lines of ...

"Witnesses are normally only allowed in the meeting while giving evidence, but in this hearing, if they wish, they may remain as Observers [, but only after they have given evidence and when the PC believes there will be no further questions]. 

Angelo, witnesses becoming observers.

The protest committee specifically considered this issue before putting that sentence in.

We deliberately chose to forgo our chance to get further evidence from witnesses.

This was an uncomfortable protest where one party (the race committee) originally named just about every member of the race management team as witnesses, and we were concerned that some of those people would get the impression of being unfairly criticised behind their backs, if they were excluded from the hearing.  We were also fairly confident that those witnesses would have little to contribute to finding the relevant facts.

Hi,

This is  what we have used for a number or regattas and seem to work well.

My experience is you need a mobile phone positioned above the area where the boats are being moved about with it logged in as a separate window. You can buy very useful stands on amazon quite cheaply.

We often use a room at the event with either the PC secretary or one judge in the room with the Parties and the witnesses/observers, who can manage calling people in and make sure the parties don't tell the witnesses what to say or move the models for them!!!!

John re: "This was an uncomfortable protest"

Oh ... I had missed that.  So what you posted is from a document produced for a specific circumstance ... and not a generalized template you were suggesting. 

My comment was based on it being a general-use template.  - Ang