I'd appreciate if anyone can help answer what the "S" runway designation means.
The runway designations of: L (left), R (right), C (center), T (true) and W (water), are all understood. However, this "S" designation has got me stumped.
Dusting off the AIM on runway markings and designations yielded no info.
Specifically, this designation is used for the turf-gravel runway 04S–22S at IYS (PAWS) airport.
I'm thinking the "S" may mean a seasonal snow runway, as the chart supplement references, "RWY 04S–22S ski/tundra tire equipped acft"... although it's unclear if this runway is explicitly closed for use during summer.
IYS (PAWS) Links:
Thanks in advance for any help on clarifying this.
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