I was recently involved in a race in which keel boats were required to round a coordinate a number of times. Not an actual physical Mark. This has me wondering. Given the definition of room and the meaning of touch. Is rule 18 applicable or enforceable in any practical way?
This is an interesting question as there is no mark on the water. I would be keen to know how the scenario pans out in such a case wrt rule 18.
www.sailing.org/inside-world-sailing/rules-regulations/racingrules/
https://www.sailing.org/tools/documents/OC13bRacingAroundWaypoints-%5B19446%5D.pdf
It would be great if the OP could provide a copy of the regatta documents (NoR/SI) which could be quite helpful, or not.
The Appx does not define a min decimal-depth (sig-fig) for WGS84 location. Therefore, the size of the location, depends upon the resolution.
Since we have a relative measure in the zone of 3 BL's, the zone's location needs to be specified to something substantially less than 1 BL for it to be usefully determined.
The Mark 3 will be the coordinate....
APP WP was not invoked. I am happy that at least this sorts out the issue of wether it is possible to touch a coordinate. There is still the matter of given that GPS location is accurate to between 2-8 m 95% of the time ( according to WS Judges Manual). How can one decide if room was given or when the zone was reached.