Sasless - now you're talking - Decca was great, as long as you didn't need it in a hurry, or at night , or in bad weather
I know someone who decided to compensate for the crosswind on a Decca approach by offsetting one lane to the right
Charron - we use 1/4 nm in the RAF Sea Kings as radar let down minima (although the theoretical minimum radar range is 75m) - my point was that a decent radar, ie one designed for more than identifying weather returns, would give reduced minima.