"The crew's been training for some weeks. We had a sit down with them (this morning) and gave them all the information we're aware of and in the next 24 hours hopefully we'll have some clarity from our international body on what might eventuate."
Peterson said the crew had come off Lake Karapiro after a training session in 4 degree temperatures and were "pretty numb.
"They are training in the middle of winter, they're cold, but they're training for all the right reasons. They know there's a possibility (of going to Rio) but there's not the excitement yet," he said.
Rowing is in a simpler situation to many other Olympic sports in that the qualification progress is straightforward. A certain number of crews qualify. Should one drop out, the crew which finished one spot out of qualifying that spot gets the trip.
Peterson said RNZ are awaiting word from their governing body Fisa.
"I imagine there's a lot going on for them and we're certainly guided by their next decision."
While he found the detail in the McLaren report "quite stunning", his primary interest is in "our athletes welfare and giving them some clarity".
That said, Peterson found it a "compelling report".
"I see it as a positive day in that these things have been uncovered, some light has been shed and tough decisions are being made. Fisa has long been a supporter of clean sport so while its disappointing in the details in the report, it's certainly encouraging with the level of information coming through."
Five Russian crews have qualified for Rio. Apart from the men's four, they have qualified in the men's lightweight four and eight, and women's eight and lightweight double scull. New Zealand have qualified in the other four.
New Zealand won't be the only country waiting with keen anticipation for the IOC decision on Russia's involvement in the Games.