The GPDC mission computer formerly fitted in the S3 can now only be viewed at the Smithsonian. It was the size and weight of Cyril Smith.
Things have moved on a tad.
One hopes so, I recall having a discussion with a P3 Tacco who previously flown on the S3. He described the Sonobouy Reference System (SRS) on the S3 as a piece of equipment that was "capable of turning a certsub into a rumour".
I gathered that he wasn't impressed.
YS