At S20 Class Championship Regatta in Oklahoma City last month the wind died during the second race. Eleven boats succeeded in finishing within the time limit. The other eight boats were scored DNF per the SIs and entries+1 per the RRS (1 boat that entered did not show).
This was all done properly according to the SIs and RRS. The wind fell after the first boat rounded the previous mark. In this case there was little the RC could do since the SIs left them no discretion in the matter.
I'd like to suggest that the "Guidelines for Conducting the S20 Class Championship Regatta" in the back of the S20CA Yearbook might offer alternatives to Entries+1
Some possibilities:
1. Many regattas in Colorado score DNF as Finishers+1.
2. Moving finish line: once the TL expires an RC boat moves down the course recording the current position of each boat not yet finished, being relatively generous with "ties". As this could only improve a boat's score, there should be little argument.
3. I'm sure there are more ideas out there.
