As discussed at length on the rowing news sites RSR ,Talk Rowing,
Yes, CUBC did use pumps for the Head of the River Race and thus avoided sinking like others….
We supplied them. Rechargable batteries. Three pumps for the 8. Emptied a bucket of water from a foot-well in under 20 seconds.
Grant Craies fitted them for CUBC and if you look carefully you can see three hoses coming out of this photo.