Re: Units
"L & R? Port and Starboard surely?"
No, it's L & R.
"What happens when the wind changes and you're approaching from the other direction?"
If you were to go ogle an airport from the air, and happened to cast an eye on first one end of a pair, and then the other, all would become clear. Here's SFO to get you started.
And stop calling me Shirley.