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Published online by Cambridge University Press: 18 January 2010
In order to find out what type of doppler navigation equipment would be most suitable for the S.A.S. fleet of DC-8s it was decided to start a programme of doppler evaluation in Spring 1958. The doppler evaluation programme included evaluation of doppler equipment from Canadian Marconi, General Precision Laboratory (G.P.L.) and Collins Radio Company.
The programme started in April 1958 with evaluation of Canadian Marconi doppler equipment. The evaluation period lasted six months. In April 1959 evaluation of Collins and G.P.L. doppler equipment started and lasted for eight months. In March 1960 evaluation of Collins and Canadian Marconi doppler equipment started and is still in progress. And finally by the middle of May 1960 evaluation of G.P.L. Radan 500 was in progress.