This regular-sized puzzle cache is located at the site of a British Commonwealth Air Training Plan (BCATP) airfield that was active during the Second World War. It is now private property, and, sadly, there is no signage to mark its historical significance. You can see from the road a few concrete structures that date back to when the airfield was home to #31 Elementary Flying Training School in the early 1940's. There is some excellent information available online that describes the BCATP and places the DeWinton airfield in its historical context.
There are two ways to uncover the final coordinates. The easiest way is to decrypt the hint on this webpage and follow its guidance. The riskier way is invest in a trip to the posted coordinates and break the code onsite. The puzzle is intentionally easy as the main purpose of the cache is to highlight this location's role in Canada's wartime history. No matter which way you choose to solve the puzzle, your task is to decipher the red letters in the strings below using the sign at the posted coordinates as the key.
N H0 TG.STT
W SSU TL.LSA
You can verify your solution on Geochecker.com. Be aware that you do not need to go on private property to reach the final coordinates. They are accessible on a public road that does not appear on Google maps.
In keeping with the spirit of the location, the initial contents of the cache have an airplane and/or military theme. Please bring appropriate trade goods.
BCATP Airfield - Calgary North (GC1TWER)
BCATP Airfield - High River (GC1TP2H)