Jack Ryan admitted to Admiral Painter and Captain Davenport about his being sleep-deprived, so maybe when da latter officer seemingly opined dat Jack was off his rocker, he was actually just meaning "sertafiable", as in, he may merely have been saying dat Jack was a little mentally-lacking due to a lack of mattress-time.
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. PenguinBooks,1992. p. 38)