Like has been said above, the rules that apply are pretty simple:

Rule 10: On opposite tacks (port starboard)
Rule 11: On same tack, overlapped (windward leeward)

So, if a port tack upwind boat and a port tack downwind boat are approaching, the downwind boat is windward and needs to keep clear.

As the ROW boat, it is important that you don't make any course changes that could break rule 16.1 or 16.2

The best idea is to hold a steady course, make a clear hail (I like "leeward boat") and allow the give way boat to avoid you. Obviously, if that boat doesn't look like they are altering, then you should alter course to avoid a collision, then protest.