diff --git a/research/36.md b/research/36.md
index 02a8490..ebe06f0 100644
--- a/research/36.md
+++ b/research/36.md
@@ -41,7 +41,16 @@
 ## Acronyms / Codes
 
 ...
+ALT = Altitude POS (ft)
+DEPA = Departure Airport
+DSTA = Destination Airport
+RWY = (Destination Airport Landing) Runway
+FOB = Fuel On Board
+N-S = Latitude POS
+E-W = Longitude POS
 
 ## Analysis
 
 ...
+Prefix 28 Message Format
+28,.,DDMMMYY,HHMMSS,N-S,E-W,ALT,(RemainingFOB?),DEPA,DSTA,DSTA,RWY/.....