Just read your book. Very enjoyable. I joined Marconi a couple of years after you, in April, 1958 aged 16, in Glasgow. My first ship was Falaise Soton to St Malo. 3 round trips a week, no Sunday sailing. Then Golfito. All out of Southampton Depot. Like you I found the manager and staff very friendly. Although I had my MOT radar ticket, one of the shore techs gave me a good session on the Quo Vadis (?) .
Anyhow, hope to read your next part soon