ref.1 ISAF International Measurers
Suggest there are no ISAF SCHRS Measurers listed above, without regards to the United States.

ref.2 NA F18 Measurers
The North American F18 Class uses ISAF protocols & processes within the context of Class Rules (not a subject matter expert, just reading). I suggest other North American Multihull Classes may or may not have "measurers", depending on the class, let alone ISAF Certified.

Portsmouth, Texel, SCHRS rely on somebody (volunteers) to measure the boats as regionally administered. The Measurer under Texel and/or SCHRS uses ISAF Equipment Rules of Sailing (ERS) to supplement Class Rules, as Dick Rose pointed out a couple of years ago to the US Sailing One-Design Council ( link ).

The ISAF ERS sail areas come out correctly, not hiccuped by Class Rules.