6 laps of OW swim, I'll happily put that down as 2.4km.
Water was 12ºC so I was cold to the core by the time I came out. (but not at all while I was in the water.)
I have a potential race next week, 750m swim+5km run.
With that in mind, I did 2 race distance simulations today after warm up and was very happy with how they went, there was even some waves from the safety boat to help acclimatise to chop...