Time to Fly

At first: Park your car at home.

The coordinates mentioned above point to a modell airfield, where you can get a helicopter for a short flight to the first destination of this cache.

Part 1:
Go to 50.858876 7.138464 (note: the coordinates are in decimal format, you'll need this format).
Arriving at destination, hover 200 meter above the ground and look down.
You'll see 2 digits and a letter: Assign digit 1 to A and digit 2 to B.
Assign the letters position in the alphabeth to C.
Define the IATA code of the airport where you now are (example: FRA = Frankfurt Airport) and assign the alphabeth position of each letter of this code to D, E and F.

Let's take a larger plane to 25.787541 -80.279966.

Part 2:
At crossing the destination coordinates, before landing, look down and assign G and H to the 2 digits of the runway number.
Also here, define the IATA code of the airport where you are now and assign the alphabeth position of each letter of this code to I, J and K.
If you have some time to spare, take a short trip to the famous beach, east of the city and perhaps enjoy a cool Mojito.

Now we will fly to BJ.GD(A+B)(B+G)HG (2*B)(F-E).JEDAKE
Save all collected values for later use.

Part 3:
At destination, again hovering at 200 meter above sealevel, you will read a text.
Assign to the letters of this text the numbers 1,2,3 to 0 in the order they appear. If a letter occurs that already has a number, ignore it. If you run out of numbers, leave the rest
It is a very sandy business over here.

Using the values derived from the text we fly to cu.aeatko e.owcwtw

Part 4:
Check the runway we land on.
Assign the respective digits to L and M and the letters position in the alphabeth to N.
Again, define the IATA code of the airport where you are now and assign the alphabeth position of each letter of this code to O, P and Q.
Perhaps enjoy a trip the city of light, before we continue our voyage direction south.

We now fly to PA.PDPKQ(A+B) (P+K).BGPQJK(D+O)

Part 5:
Define the IATA code of this airport and assign the alphabeth position of each letter of this code to R, S and T.
At destination we see some Canadair CL415 (also called Bombardier 415) amphibious firefighters, which are rowed up orderly on the apron.
How many of them do you see. Assign this value to V.
At the other side of the airport you'll find several chaotically parked older Canadair CL215. Assign U with the amount of them.

Take one of the CL215 or CL415 and fly north.

WP1:
Land at the small lake near: North: VL°(T*2).(T*V+Q) East: V+K°(R+K).((Q*V+K)*R+T) (back to normal coordinate format)
(You can park your car at North: VL°(T*2).GP(U-K) East: V+K°R.(R*(T*2-1)))

From here you see a sign which tells you the name of the "lake" and the year it has been constructed.
Assign this year to W.

You will find the cache at North: VL°(W/50-G).L(R+U+K) East: V+K°((W/200)+P).PBP