Tricky IFR Questions At Interviews

[The Messiah]

Reaching the minima on the ILS how do you tell if you have 800m, 1.2k or 1.5k vis?

When calculating ROD req'd for a 3 deg slope why do you add the 50'? ie 5 x GS + 50. eg GS 150kt means 800 fpm req'd.