PEC
Overmars,
I reckon PEC is a "one off" 50' amendment.
If we are talking about ROD calculations on a 3deg slope, and if you're adding 50' to the result after 5GS, it would result in a 50 foot per minute increase to your ROD during the approach rather than increasing MDA's, which have no bearing to your ROD calculation.
Me think that the 50' addition to the ROD calculation allows for a more exact profile, i.e. 3.3 degrees.
This of course assuming a fairly typical range of approach ground speeds, for example 120 - 170kts, so CAT B & C, perhaps. If your APP GS is any greater, you may find you have to add more than 50fpm to your ROD calculation to achieve the 3.3 degree slope.
Does this sound feasible or have I had too many jellycups??
520.