In another interesting blog (scroll to June 11), Helena Smalman-Smith wrote “On and on and on: How we set a new 24 hour distance rowing Guinness World Record”
The post describes logistics involved in achieving a new Guinness World Rowing Record.
Preparation time for the record took 10 months. Leading up to, and on ‘record day’, 30 people were involved so that 8 women, including Helena, could set the official record in a quad scull. They rowed as two 4-person teams, 2 hours rowing and 2 hours rest.
The actual record, 44km (27.3 miles) better than the previous record, was set in June of 2016 rowing the “Kingston stretch of the Thames” River.