The Vietnam war ended and an American Apollo and a Soviet Soyuz spacecraft docked with each other in orbit, marking the first such link-up between spacecraft from the two nations.
The 1975 all-ticket Conference was opened by Lord Shackleton of Burleigh (son of the Antarctic explorer), he was the first guest conference-opener who had actually spent some time working as a surveyor. The control of numbers proposed in 1971 had been implemented, causing some unrest over the difficulty in accessing the Conference – so presenting a paper was found to be a good way to get in! 318 did manage to attend, even if only part-time.
Doppler satellites received a good coverage in the Conference papers and there was a paper on another new development – desktop computers (or ‘programmable’ calculators, as they were initially known).