Richard Brett-Knowles (1924-2015), electronics engineer, worked on radar and other electronics systems for the Telecommunications Research Establishment during World War Two. This included working in the field supporting anti-submarine radar used by patrol aircraft. After the war he joined the Royal Navy as an instructor officer, and from 1952-54 he was part of the British North Greenland Expedition, where hewas communications officer and assisted with seismological research. On his return to the UK he taught physics and sailing at Dartmouth Naval College before leaving the Navy to join the Admiralty Surface Weapons Establishment, where he was involved with the Sea Slug missile and other projects. After taking early retirement he worked as a consultant and continued his long-standing hobby of ham radio.