During the Second World War the Navy developed a new technology to find enemy submarines underwater. This was called ‘ASDIC’, and was based on the understanding that sound signals could be transmitted into the water and any echo would be heard if the sound wave hit a solid enough target. The echo could be detected by a hydrophone and displayed on a suitable display screen, showing distance from sound source to sound echo and also the direction that the sound source was sent away.
The collage above celebrates the final opening of the Boathouse in 2017, when Friends of the Archive provided light refreshments for visitors and there was some mulled wine on hand. We were closed for a Christmas break from 22nd December until 2nd January but are now in full swing again.