Holidays ? The best moment for having freetime.
Freetime ? Playing with a good PC simulator (SH III) and some related readings.
Particulary, a little worn book from my library, but a "must have" ...
Herbert Werner -
Dix-huit secondes pour survivre (
Die Eisernen Särge /
Eighteen seconds to survive) - 1969 - 494 pages
Cheers.