Here's a compact version of the "Manuals" of that era, usually transmitted by word of mouth by a dive club cox.
Pump up firm, starting at the bow.
check for leaks,
add petrol and oil as required,
place in water.
Go.
On return, if there are no expansion valves reduce the pressure in at least the two rear tubes to allow for thermal expansion.
Always bring the pump with you.
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