Am I the only one who found this kind of funny? From the article - Spencer.
'While he was with the navy, he made himself an expert on radio technology: "I just got hold of a lot of textbooks and taught myself while I was standing watch at night."
Watch standing as I understand it would be to watch an assigned section even if nothing is happening but one must not be distracted or sit down to relax. Studying textbooks would be a no-no. Watch stand duty would drive me batshit.
https://en.wikipedia.org/wiki/Percy_Spencer
https://en.wikipedia.org/wiki/Howland,_Maine